CINXE.COM
Richard Feynman Quiz: Think You Know Richard Feynman?
<!DOCTYPE html><html lang="en-US" class="html_stretched responsive av-preloader-disabled html_header_top html_logo_left html_main_nav_header html_menu_right html_custom html_header_sticky html_header_shrinking_disabled html_mobile_menu_phone html_header_searchicon html_content_align_center html_header_unstick_top_disabled html_header_stretch_disabled html_av-submenu-hidden html_av-submenu-display-click html_av-overlay-side html_av-overlay-side-classic html_av-submenu-noclone html_entry_id_951 av-cookies-no-cookie-consent av-no-preview av-default-lightbox html_text_menu_active av-mobile-menu-switch-default"><head><meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1"><meta charset="UTF-8" /> <script async src="https://www.googletagmanager.com/gtag/js?id=UA-2209856-4"></script> <script>window.dataLayer = window.dataLayer || []; function gtag(){dataLayer.push(arguments);} gtag('js', new Date()); gtag('config', 'UA-2209856-4');</script> <script data-optimized="1" src="https://www.physicsforums.com/insights/wp-content/litespeed/js/2592eef92248026c6738059400d0d827.js?ver=0d827" defer type="text/javascript"></script> <meta name="viewport" content="width=device-width, initial-scale=1"><meta name='robots' content='index, follow, max-image-preview:large, max-snippet:-1, max-video-preview:-1' /><style>img:is([sizes="auto" i], [sizes^="auto," i]) { contain-intrinsic-size: 3000px 1500px }</style><title>Richard Feynman Quiz: Think You Know Richard Feynman?</title><meta name="description" content="Richard Feynman is one of the most popular and highly regarded physicists of all time. You think you may know him, but do you?" /><link rel="canonical" href="https://www.physicsforums.com/insights/think-know-richard-feynman/" /><meta property="og:locale" content="en_US" /><meta property="og:type" content="article" /><meta property="og:title" content="Richard Feynman Quiz: Think You Know Richard Feynman?" /><meta property="og:description" content="Richard Feynman is one of the most popular and highly regarded physicists of all time. You think you may know him, but do you?" /><meta property="og:url" content="https://www.physicsforums.com/insights/think-know-richard-feynman/" /><meta property="og:site_name" content="Physics Forums Insights" /><meta property="article:publisher" content="https://www.facebook.com/physicsforums" /><meta property="article:author" content="https://www.facebook.com/physicsforums/" /><meta property="article:published_time" content="2015-05-05T23:40:09+00:00" /><meta property="article:modified_time" content="2024-09-02T14:16:29+00:00" /><meta property="og:image" content="https://www.physicsforums.com/insights/wp-content/uploads/2015/05/feynman_quiz.png" /><meta property="og:image:width" content="240" /><meta property="og:image:height" content="135" /><meta property="og:image:type" content="image/png" /><meta name="author" content="Greg Bernhardt" /><meta name="twitter:card" content="summary_large_image" /><meta name="twitter:creator" content="@physicsforums" /><meta name="twitter:site" content="@physicsforums" /><meta name="twitter:label1" content="Written by" /><meta name="twitter:data1" content="Greg Bernhardt" /><meta name="twitter:label2" content="Est. reading time" /><meta name="twitter:data2" content="2 minutes" /> <script type="application/ld+json" class="yoast-schema-graph">{"@context":"https://schema.org","@graph":[{"@type":"Article","@id":"https://www.physicsforums.com/insights/think-know-richard-feynman/#article","isPartOf":{"@id":"https://www.physicsforums.com/insights/think-know-richard-feynman/"},"author":{"name":"Greg Bernhardt","@id":"https://www.physicsforums.com/insights/#/schema/person/d521208e1fedcf92460bb86bca125b74"},"headline":"Richard Feynman Quiz: Think You Know Richard Feynman?","datePublished":"2015-05-05T23:40:09+00:00","dateModified":"2024-09-02T14:16:29+00:00","mainEntityOfPage":{"@id":"https://www.physicsforums.com/insights/think-know-richard-feynman/"},"wordCount":455,"commentCount":74,"publisher":{"@id":"https://www.physicsforums.com/insights/#organization"},"image":{"@id":"https://www.physicsforums.com/insights/think-know-richard-feynman/#primaryimage"},"thumbnailUrl":"https://www.physicsforums.com/insights/wp-content/uploads/2015/05/feynman_quiz.png","keywords":["interview"],"articleSection":["Quizzes"],"inLanguage":"en-US","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https://www.physicsforums.com/insights/think-know-richard-feynman/#respond"]}]},{"@type":"WebPage","@id":"https://www.physicsforums.com/insights/think-know-richard-feynman/","url":"https://www.physicsforums.com/insights/think-know-richard-feynman/","name":"Richard Feynman Quiz: Think You Know Richard Feynman?","isPartOf":{"@id":"https://www.physicsforums.com/insights/#website"},"primaryImageOfPage":{"@id":"https://www.physicsforums.com/insights/think-know-richard-feynman/#primaryimage"},"image":{"@id":"https://www.physicsforums.com/insights/think-know-richard-feynman/#primaryimage"},"thumbnailUrl":"https://www.physicsforums.com/insights/wp-content/uploads/2015/05/feynman_quiz.png","datePublished":"2015-05-05T23:40:09+00:00","dateModified":"2024-09-02T14:16:29+00:00","description":"Richard Feynman is one of the most popular and highly regarded physicists of all time. You think you may know him, but do you?","breadcrumb":{"@id":"https://www.physicsforums.com/insights/think-know-richard-feynman/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https://www.physicsforums.com/insights/think-know-richard-feynman/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https://www.physicsforums.com/insights/think-know-richard-feynman/#primaryimage","url":"https://www.physicsforums.com/insights/wp-content/uploads/2015/05/feynman_quiz.png","contentUrl":"https://www.physicsforums.com/insights/wp-content/uploads/2015/05/feynman_quiz.png","width":240,"height":135,"caption":"Richard Feynman"},{"@type":"BreadcrumbList","@id":"https://www.physicsforums.com/insights/think-know-richard-feynman/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://www.physicsforums.com/insights/"},{"@type":"ListItem","position":2,"name":"Richard Feynman Quiz: Think You Know Richard Feynman?"}]},{"@type":"WebSite","@id":"https://www.physicsforums.com/insights/#website","url":"https://www.physicsforums.com/insights/","name":"Physics Forums Insights","description":"Science and Math Articles, Tutorials and Guides","publisher":{"@id":"https://www.physicsforums.com/insights/#organization"},"alternateName":"PF Insights","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://www.physicsforums.com/insights/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Organization","@id":"https://www.physicsforums.com/insights/#organization","name":"Physics Forums","url":"https://www.physicsforums.com/insights/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https://www.physicsforums.com/insights/#/schema/logo/image/","url":"https://www.physicsforums.com/insights/wp-content/uploads/2018/05/facebook_image-1.png","contentUrl":"https://www.physicsforums.com/insights/wp-content/uploads/2018/05/facebook_image-1.png","width":205,"height":200,"caption":"Physics Forums"},"image":{"@id":"https://www.physicsforums.com/insights/#/schema/logo/image/"},"sameAs":["https://www.facebook.com/physicsforums","https://x.com/physicsforums","https://www.linkedin.com/company/physics-forums","https://www.pinterest.com/physicsforums"]},{"@type":"Person","@id":"https://www.physicsforums.com/insights/#/schema/person/d521208e1fedcf92460bb86bca125b74","name":"Greg Bernhardt","description":"I have a BS in Information Sciences from UW-Milwaukee. I've helped manage Physics Forums for over 22 years. I enjoy learning and discussing new scientific developments. STEM communication and policy are big interests as well. Currently a Sr. SEO Specialist at Shopify and writer at importsem.com","sameAs":["https://www.facebook.com/physicsforums/"],"url":"https://www.physicsforums.com/insights/author/greg-bernhardt/"}]}</script> <link rel="alternate" type="application/rss+xml" title="Physics Forums Insights » Feed" href="https://www.physicsforums.com/insights/feed/" /> <script type="text/javascript" id="wpp-js" src="https://www.physicsforums.com/insights/wp-content/plugins/wordpress-popular-posts/assets/js/wpp.js?ver=7.2.0" data-sampling="0" data-sampling-rate="100" data-api-url="https://www.physicsforums.com/insights/wp-json/wordpress-popular-posts" data-post-id="951" data-token="face8476af" data-lang="0" data-debug="1"></script> <link data-optimized="1" rel='stylesheet' id='xpress_wp_admin_style-css' href='https://www.physicsforums.com/insights/wp-content/litespeed/css/59568f3369115d72ade0de8186a4674e.css?ver=4674e' type='text/css' media='all' /><link data-optimized="1" rel='stylesheet' id='wp-block-library-css' href='https://www.physicsforums.com/insights/wp-content/litespeed/css/ad10b27e06583ae315af8368433fa1f7.css?ver=b9180' type='text/css' media='all' /><style id='global-styles-inline-css' type='text/css'>:root{--wp--preset--aspect-ratio--square: 1;--wp--preset--aspect-ratio--4-3: 4/3;--wp--preset--aspect-ratio--3-4: 3/4;--wp--preset--aspect-ratio--3-2: 3/2;--wp--preset--aspect-ratio--2-3: 2/3;--wp--preset--aspect-ratio--16-9: 16/9;--wp--preset--aspect-ratio--9-16: 9/16;--wp--preset--color--black: #000000;--wp--preset--color--cyan-bluish-gray: #abb8c3;--wp--preset--color--white: #ffffff;--wp--preset--color--pale-pink: #f78da7;--wp--preset--color--vivid-red: #cf2e2e;--wp--preset--color--luminous-vivid-orange: #ff6900;--wp--preset--color--luminous-vivid-amber: #fcb900;--wp--preset--color--light-green-cyan: #7bdcb5;--wp--preset--color--vivid-green-cyan: #00d084;--wp--preset--color--pale-cyan-blue: #8ed1fc;--wp--preset--color--vivid-cyan-blue: #0693e3;--wp--preset--color--vivid-purple: #9b51e0;--wp--preset--color--metallic-red: #b02b2c;--wp--preset--color--maximum-yellow-red: #edae44;--wp--preset--color--yellow-sun: #eeee22;--wp--preset--color--palm-leaf: #83a846;--wp--preset--color--aero: #7bb0e7;--wp--preset--color--old-lavender: #745f7e;--wp--preset--color--steel-teal: #5f8789;--wp--preset--color--raspberry-pink: #d65799;--wp--preset--color--medium-turquoise: #4ecac2;--wp--preset--gradient--vivid-cyan-blue-to-vivid-purple: linear-gradient(135deg,rgba(6,147,227,1) 0%,rgb(155,81,224) 100%);--wp--preset--gradient--light-green-cyan-to-vivid-green-cyan: linear-gradient(135deg,rgb(122,220,180) 0%,rgb(0,208,130) 100%);--wp--preset--gradient--luminous-vivid-amber-to-luminous-vivid-orange: linear-gradient(135deg,rgba(252,185,0,1) 0%,rgba(255,105,0,1) 100%);--wp--preset--gradient--luminous-vivid-orange-to-vivid-red: linear-gradient(135deg,rgba(255,105,0,1) 0%,rgb(207,46,46) 100%);--wp--preset--gradient--very-light-gray-to-cyan-bluish-gray: linear-gradient(135deg,rgb(238,238,238) 0%,rgb(169,184,195) 100%);--wp--preset--gradient--cool-to-warm-spectrum: linear-gradient(135deg,rgb(74,234,220) 0%,rgb(151,120,209) 20%,rgb(207,42,186) 40%,rgb(238,44,130) 60%,rgb(251,105,98) 80%,rgb(254,248,76) 100%);--wp--preset--gradient--blush-light-purple: linear-gradient(135deg,rgb(255,206,236) 0%,rgb(152,150,240) 100%);--wp--preset--gradient--blush-bordeaux: linear-gradient(135deg,rgb(254,205,165) 0%,rgb(254,45,45) 50%,rgb(107,0,62) 100%);--wp--preset--gradient--luminous-dusk: linear-gradient(135deg,rgb(255,203,112) 0%,rgb(199,81,192) 50%,rgb(65,88,208) 100%);--wp--preset--gradient--pale-ocean: linear-gradient(135deg,rgb(255,245,203) 0%,rgb(182,227,212) 50%,rgb(51,167,181) 100%);--wp--preset--gradient--electric-grass: linear-gradient(135deg,rgb(202,248,128) 0%,rgb(113,206,126) 100%);--wp--preset--gradient--midnight: linear-gradient(135deg,rgb(2,3,129) 0%,rgb(40,116,252) 100%);--wp--preset--font-size--small: 1rem;--wp--preset--font-size--medium: 1.125rem;--wp--preset--font-size--large: 1.75rem;--wp--preset--font-size--x-large: clamp(1.75rem, 3vw, 2.25rem);--wp--preset--spacing--20: 0.44rem;--wp--preset--spacing--30: 0.67rem;--wp--preset--spacing--40: 1rem;--wp--preset--spacing--50: 1.5rem;--wp--preset--spacing--60: 2.25rem;--wp--preset--spacing--70: 3.38rem;--wp--preset--spacing--80: 5.06rem;--wp--preset--shadow--natural: 6px 6px 9px rgba(0, 0, 0, 0.2);--wp--preset--shadow--deep: 12px 12px 50px rgba(0, 0, 0, 0.4);--wp--preset--shadow--sharp: 6px 6px 0px rgba(0, 0, 0, 0.2);--wp--preset--shadow--outlined: 6px 6px 0px -3px rgba(255, 255, 255, 1), 6px 6px rgba(0, 0, 0, 1);--wp--preset--shadow--crisp: 6px 6px 0px rgba(0, 0, 0, 1);}:root { --wp--style--global--content-size: 800px;--wp--style--global--wide-size: 1130px; }:where(body) { margin: 0; }.wp-site-blocks > .alignleft { float: left; margin-right: 2em; }.wp-site-blocks > .alignright { float: right; margin-left: 2em; }.wp-site-blocks > .aligncenter { justify-content: center; margin-left: auto; margin-right: auto; }:where(.is-layout-flex){gap: 0.5em;}:where(.is-layout-grid){gap: 0.5em;}.is-layout-flow > .alignleft{float: left;margin-inline-start: 0;margin-inline-end: 2em;}.is-layout-flow > .alignright{float: right;margin-inline-start: 2em;margin-inline-end: 0;}.is-layout-flow > .aligncenter{margin-left: auto !important;margin-right: auto !important;}.is-layout-constrained > .alignleft{float: left;margin-inline-start: 0;margin-inline-end: 2em;}.is-layout-constrained > .alignright{float: right;margin-inline-start: 2em;margin-inline-end: 0;}.is-layout-constrained > .aligncenter{margin-left: auto !important;margin-right: auto !important;}.is-layout-constrained > :where(:not(.alignleft):not(.alignright):not(.alignfull)){max-width: var(--wp--style--global--content-size);margin-left: auto !important;margin-right: auto !important;}.is-layout-constrained > .alignwide{max-width: var(--wp--style--global--wide-size);}body .is-layout-flex{display: flex;}.is-layout-flex{flex-wrap: wrap;align-items: center;}.is-layout-flex > :is(*, div){margin: 0;}body .is-layout-grid{display: grid;}.is-layout-grid > :is(*, div){margin: 0;}body{padding-top: 0px;padding-right: 0px;padding-bottom: 0px;padding-left: 0px;}a:where(:not(.wp-element-button)){text-decoration: underline;}:root :where(.wp-element-button, .wp-block-button__link){background-color: #32373c;border-width: 0;color: #fff;font-family: inherit;font-size: inherit;line-height: inherit;padding: calc(0.667em + 2px) calc(1.333em + 2px);text-decoration: none;}.has-black-color{color: var(--wp--preset--color--black) !important;}.has-cyan-bluish-gray-color{color: var(--wp--preset--color--cyan-bluish-gray) !important;}.has-white-color{color: var(--wp--preset--color--white) !important;}.has-pale-pink-color{color: var(--wp--preset--color--pale-pink) !important;}.has-vivid-red-color{color: var(--wp--preset--color--vivid-red) !important;}.has-luminous-vivid-orange-color{color: var(--wp--preset--color--luminous-vivid-orange) !important;}.has-luminous-vivid-amber-color{color: var(--wp--preset--color--luminous-vivid-amber) !important;}.has-light-green-cyan-color{color: var(--wp--preset--color--light-green-cyan) !important;}.has-vivid-green-cyan-color{color: var(--wp--preset--color--vivid-green-cyan) !important;}.has-pale-cyan-blue-color{color: var(--wp--preset--color--pale-cyan-blue) !important;}.has-vivid-cyan-blue-color{color: var(--wp--preset--color--vivid-cyan-blue) !important;}.has-vivid-purple-color{color: var(--wp--preset--color--vivid-purple) !important;}.has-metallic-red-color{color: var(--wp--preset--color--metallic-red) !important;}.has-maximum-yellow-red-color{color: var(--wp--preset--color--maximum-yellow-red) !important;}.has-yellow-sun-color{color: var(--wp--preset--color--yellow-sun) !important;}.has-palm-leaf-color{color: var(--wp--preset--color--palm-leaf) !important;}.has-aero-color{color: var(--wp--preset--color--aero) !important;}.has-old-lavender-color{color: var(--wp--preset--color--old-lavender) !important;}.has-steel-teal-color{color: var(--wp--preset--color--steel-teal) !important;}.has-raspberry-pink-color{color: var(--wp--preset--color--raspberry-pink) !important;}.has-medium-turquoise-color{color: var(--wp--preset--color--medium-turquoise) !important;}.has-black-background-color{background-color: var(--wp--preset--color--black) !important;}.has-cyan-bluish-gray-background-color{background-color: var(--wp--preset--color--cyan-bluish-gray) !important;}.has-white-background-color{background-color: var(--wp--preset--color--white) !important;}.has-pale-pink-background-color{background-color: var(--wp--preset--color--pale-pink) !important;}.has-vivid-red-background-color{background-color: var(--wp--preset--color--vivid-red) !important;}.has-luminous-vivid-orange-background-color{background-color: var(--wp--preset--color--luminous-vivid-orange) !important;}.has-luminous-vivid-amber-background-color{background-color: var(--wp--preset--color--luminous-vivid-amber) !important;}.has-light-green-cyan-background-color{background-color: var(--wp--preset--color--light-green-cyan) !important;}.has-vivid-green-cyan-background-color{background-color: var(--wp--preset--color--vivid-green-cyan) !important;}.has-pale-cyan-blue-background-color{background-color: var(--wp--preset--color--pale-cyan-blue) !important;}.has-vivid-cyan-blue-background-color{background-color: var(--wp--preset--color--vivid-cyan-blue) !important;}.has-vivid-purple-background-color{background-color: var(--wp--preset--color--vivid-purple) !important;}.has-metallic-red-background-color{background-color: var(--wp--preset--color--metallic-red) !important;}.has-maximum-yellow-red-background-color{background-color: var(--wp--preset--color--maximum-yellow-red) !important;}.has-yellow-sun-background-color{background-color: var(--wp--preset--color--yellow-sun) !important;}.has-palm-leaf-background-color{background-color: var(--wp--preset--color--palm-leaf) !important;}.has-aero-background-color{background-color: var(--wp--preset--color--aero) !important;}.has-old-lavender-background-color{background-color: var(--wp--preset--color--old-lavender) !important;}.has-steel-teal-background-color{background-color: var(--wp--preset--color--steel-teal) !important;}.has-raspberry-pink-background-color{background-color: var(--wp--preset--color--raspberry-pink) !important;}.has-medium-turquoise-background-color{background-color: var(--wp--preset--color--medium-turquoise) !important;}.has-black-border-color{border-color: var(--wp--preset--color--black) !important;}.has-cyan-bluish-gray-border-color{border-color: var(--wp--preset--color--cyan-bluish-gray) !important;}.has-white-border-color{border-color: var(--wp--preset--color--white) !important;}.has-pale-pink-border-color{border-color: var(--wp--preset--color--pale-pink) !important;}.has-vivid-red-border-color{border-color: var(--wp--preset--color--vivid-red) !important;}.has-luminous-vivid-orange-border-color{border-color: var(--wp--preset--color--luminous-vivid-orange) !important;}.has-luminous-vivid-amber-border-color{border-color: var(--wp--preset--color--luminous-vivid-amber) !important;}.has-light-green-cyan-border-color{border-color: var(--wp--preset--color--light-green-cyan) !important;}.has-vivid-green-cyan-border-color{border-color: var(--wp--preset--color--vivid-green-cyan) !important;}.has-pale-cyan-blue-border-color{border-color: var(--wp--preset--color--pale-cyan-blue) !important;}.has-vivid-cyan-blue-border-color{border-color: var(--wp--preset--color--vivid-cyan-blue) !important;}.has-vivid-purple-border-color{border-color: var(--wp--preset--color--vivid-purple) !important;}.has-metallic-red-border-color{border-color: var(--wp--preset--color--metallic-red) !important;}.has-maximum-yellow-red-border-color{border-color: var(--wp--preset--color--maximum-yellow-red) !important;}.has-yellow-sun-border-color{border-color: var(--wp--preset--color--yellow-sun) !important;}.has-palm-leaf-border-color{border-color: var(--wp--preset--color--palm-leaf) !important;}.has-aero-border-color{border-color: var(--wp--preset--color--aero) !important;}.has-old-lavender-border-color{border-color: var(--wp--preset--color--old-lavender) !important;}.has-steel-teal-border-color{border-color: var(--wp--preset--color--steel-teal) !important;}.has-raspberry-pink-border-color{border-color: var(--wp--preset--color--raspberry-pink) !important;}.has-medium-turquoise-border-color{border-color: var(--wp--preset--color--medium-turquoise) !important;}.has-vivid-cyan-blue-to-vivid-purple-gradient-background{background: var(--wp--preset--gradient--vivid-cyan-blue-to-vivid-purple) !important;}.has-light-green-cyan-to-vivid-green-cyan-gradient-background{background: var(--wp--preset--gradient--light-green-cyan-to-vivid-green-cyan) !important;}.has-luminous-vivid-amber-to-luminous-vivid-orange-gradient-background{background: var(--wp--preset--gradient--luminous-vivid-amber-to-luminous-vivid-orange) !important;}.has-luminous-vivid-orange-to-vivid-red-gradient-background{background: var(--wp--preset--gradient--luminous-vivid-orange-to-vivid-red) !important;}.has-very-light-gray-to-cyan-bluish-gray-gradient-background{background: var(--wp--preset--gradient--very-light-gray-to-cyan-bluish-gray) !important;}.has-cool-to-warm-spectrum-gradient-background{background: var(--wp--preset--gradient--cool-to-warm-spectrum) !important;}.has-blush-light-purple-gradient-background{background: var(--wp--preset--gradient--blush-light-purple) !important;}.has-blush-bordeaux-gradient-background{background: var(--wp--preset--gradient--blush-bordeaux) !important;}.has-luminous-dusk-gradient-background{background: var(--wp--preset--gradient--luminous-dusk) !important;}.has-pale-ocean-gradient-background{background: var(--wp--preset--gradient--pale-ocean) !important;}.has-electric-grass-gradient-background{background: var(--wp--preset--gradient--electric-grass) !important;}.has-midnight-gradient-background{background: var(--wp--preset--gradient--midnight) !important;}.has-small-font-size{font-size: var(--wp--preset--font-size--small) !important;}.has-medium-font-size{font-size: var(--wp--preset--font-size--medium) !important;}.has-large-font-size{font-size: var(--wp--preset--font-size--large) !important;}.has-x-large-font-size{font-size: var(--wp--preset--font-size--x-large) !important;} :where(.wp-block-post-template.is-layout-flex){gap: 1.25em;}:where(.wp-block-post-template.is-layout-grid){gap: 1.25em;} :where(.wp-block-columns.is-layout-flex){gap: 2em;}:where(.wp-block-columns.is-layout-grid){gap: 2em;} :root :where(.wp-block-pullquote){font-size: 1.5em;line-height: 1.6;}</style><link data-optimized="1" rel='stylesheet' id='ez-toc-css' href='https://www.physicsforums.com/insights/wp-content/litespeed/css/008d509d4fec340652d0312244582360.css?ver=d7f24' type='text/css' media='all' /><style id='ez-toc-inline-css' type='text/css'>div#ez-toc-container .ez-toc-title {font-size: 120%;}div#ez-toc-container .ez-toc-title {font-weight: 500;}div#ez-toc-container ul li {font-size: 95%;}div#ez-toc-container ul li {font-weight: 500;}div#ez-toc-container nav ul ul li {font-size: 90%;}div#ez-toc-container {background: #fff;border: 1px solid #ddd;}div#ez-toc-container p.ez-toc-title , #ez-toc-container .ez_toc_custom_title_icon , #ez-toc-container .ez_toc_custom_toc_icon {color: #4c4c4c;}div#ez-toc-container ul.ez-toc-list a {color: #066fac;}div#ez-toc-container ul.ez-toc-list a:hover {color: #235887;}div#ez-toc-container ul.ez-toc-list a:visited {color: #4594d1;} .ez-toc-container-direction {direction: ltr;}.ez-toc-counter ul{counter-reset: item ;}.ez-toc-counter nav ul li a::before {content: counters(item, '.', decimal) '. ';display: inline-block;counter-increment: item;flex-grow: 0;flex-shrink: 0;margin-right: .2em; float: left; }.ez-toc-widget-direction {direction: ltr;}.ez-toc-widget-container ul{counter-reset: item ;}.ez-toc-widget-container nav ul li a::before {content: counters(item, '.', decimal) '. ';display: inline-block;counter-increment: item;flex-grow: 0;flex-shrink: 0;margin-right: .2em; float: left; }</style><link data-optimized="1" rel='stylesheet' id='wordpress-popular-posts-css-css' href='https://www.physicsforums.com/insights/wp-content/litespeed/css/f37de7c74c7905b881abee3714c59450.css?ver=b2ec6' type='text/css' media='all' /><link data-optimized="1" rel='stylesheet' id='avia-merged-styles-css' href='https://www.physicsforums.com/insights/wp-content/litespeed/css/820f1a9cc2793db8f9fe7fdd0a2a765a.css?ver=a765a' type='text/css' media='all' /> <script data-optimized="1" type="text/javascript" async='async' src="https://www.physicsforums.com/insights/wp-content/litespeed/js/b1c84e2e0f329a7697c4102475f95b4a.js?ver=95b4a" id="avia-head-scripts-js"></script> <style id="wpp-loading-animation-styles">@-webkit-keyframes bgslide{from{background-position-x:0}to{background-position-x:-200%}}@keyframes bgslide{from{background-position-x:0}to{background-position-x:-200%}}.wpp-widget-block-placeholder,.wpp-shortcode-placeholder{margin:0 auto;width:60px;height:3px;background:#dd3737;background:linear-gradient(90deg,#dd3737 0%,#571313 10%,#dd3737 100%);background-size:200% auto;border-radius:3px;-webkit-animation:bgslide 1s infinite linear;animation:bgslide 1s infinite linear}</style><link rel="profile" href="https://gmpg.org/xfn/11" /><link rel="alternate" type="application/rss+xml" title="Physics Forums Insights RSS2 Feed" href="https://www.physicsforums.com/insights/feed/" /><link rel="pingback" href="https://www.physicsforums.com/insights/xmlrpc.php" /><style type='text/css' media='screen'>#top #header_main > .container, #top #header_main > .container .main_menu .av-main-nav > li > a, #top #header_main #menu-item-shop .cart_dropdown_link{ height:70px; line-height: 70px; } .html_top_nav_header .av-logo-container{ height:70px; } .html_header_top.html_header_sticky #top #wrap_all #main{ padding-top:70px; }</style><!--[if lt IE 9]><script src="https://www.physicsforums.com/insights/wp-content/themes/enfold/js/html5shiv.js"></script><![endif]--><link rel="icon" href="https://www.physicsforums.com/insights/wp-content/uploads/2016/08/favicon.ico" type="image/x-icon"><style type="text/css">.saboxplugin-wrap{-webkit-box-sizing:border-box;-moz-box-sizing:border-box;-ms-box-sizing:border-box;box-sizing:border-box;border:1px solid #eee;width:100%;clear:both;display:block;overflow:hidden;word-wrap:break-word;position:relative}.saboxplugin-wrap .saboxplugin-gravatar{float:left;padding:0 20px 20px 20px}.saboxplugin-wrap .saboxplugin-gravatar img{max-width:100px;height:auto;border-radius:0;}.saboxplugin-wrap .saboxplugin-authorname{font-size:18px;line-height:1;margin:20px 0 0 20px;display:block}.saboxplugin-wrap .saboxplugin-authorname a{text-decoration:none}.saboxplugin-wrap .saboxplugin-authorname a:focus{outline:0}.saboxplugin-wrap .saboxplugin-desc{display:block;margin:5px 20px}.saboxplugin-wrap .saboxplugin-desc a{text-decoration:underline}.saboxplugin-wrap .saboxplugin-desc p{margin:5px 0 12px}.saboxplugin-wrap .saboxplugin-web{margin:0 20px 15px;text-align:left}.saboxplugin-wrap .sab-web-position{text-align:right}.saboxplugin-wrap .saboxplugin-web a{color:#ccc;text-decoration:none}.saboxplugin-wrap .saboxplugin-socials{position:relative;display:block;background:#fcfcfc;padding:5px;border-top:1px solid #eee}.saboxplugin-wrap .saboxplugin-socials a svg{width:20px;height:20px}.saboxplugin-wrap .saboxplugin-socials a svg .st2{fill:#fff; transform-origin:center center;}.saboxplugin-wrap .saboxplugin-socials a svg .st1{fill:rgba(0,0,0,.3)}.saboxplugin-wrap .saboxplugin-socials a:hover{opacity:.8;-webkit-transition:opacity .4s;-moz-transition:opacity .4s;-o-transition:opacity .4s;transition:opacity .4s;box-shadow:none!important;-webkit-box-shadow:none!important}.saboxplugin-wrap .saboxplugin-socials .saboxplugin-icon-color{box-shadow:none;padding:0;border:0;-webkit-transition:opacity .4s;-moz-transition:opacity .4s;-o-transition:opacity .4s;transition:opacity .4s;display:inline-block;color:#fff;font-size:0;text-decoration:inherit;margin:5px;-webkit-border-radius:0;-moz-border-radius:0;-ms-border-radius:0;-o-border-radius:0;border-radius:0;overflow:hidden}.saboxplugin-wrap .saboxplugin-socials .saboxplugin-icon-grey{text-decoration:inherit;box-shadow:none;position:relative;display:-moz-inline-stack;display:inline-block;vertical-align:middle;zoom:1;margin:10px 5px;color:#444;fill:#444}.clearfix:after,.clearfix:before{content:' ';display:table;line-height:0;clear:both}.ie7 .clearfix{zoom:1}.saboxplugin-socials.sabox-colored .saboxplugin-icon-color .sab-twitch{border-color:#38245c}.saboxplugin-socials.sabox-colored .saboxplugin-icon-color .sab-addthis{border-color:#e91c00}.saboxplugin-socials.sabox-colored .saboxplugin-icon-color .sab-behance{border-color:#003eb0}.saboxplugin-socials.sabox-colored .saboxplugin-icon-color .sab-delicious{border-color:#06c}.saboxplugin-socials.sabox-colored .saboxplugin-icon-color .sab-deviantart{border-color:#036824}.saboxplugin-socials.sabox-colored .saboxplugin-icon-color .sab-digg{border-color:#00327c}.saboxplugin-socials.sabox-colored .saboxplugin-icon-color .sab-dribbble{border-color:#ba1655}.saboxplugin-socials.sabox-colored .saboxplugin-icon-color .sab-facebook{border-color:#1e2e4f}.saboxplugin-socials.sabox-colored .saboxplugin-icon-color .sab-flickr{border-color:#003576}.saboxplugin-socials.sabox-colored .saboxplugin-icon-color .sab-github{border-color:#264874}.saboxplugin-socials.sabox-colored .saboxplugin-icon-color .sab-google{border-color:#0b51c5}.saboxplugin-socials.sabox-colored .saboxplugin-icon-color .sab-googleplus{border-color:#96271a}.saboxplugin-socials.sabox-colored .saboxplugin-icon-color .sab-html5{border-color:#902e13}.saboxplugin-socials.sabox-colored .saboxplugin-icon-color .sab-instagram{border-color:#1630aa}.saboxplugin-socials.sabox-colored .saboxplugin-icon-color .sab-linkedin{border-color:#00344f}.saboxplugin-socials.sabox-colored .saboxplugin-icon-color .sab-pinterest{border-color:#5b040e}.saboxplugin-socials.sabox-colored .saboxplugin-icon-color .sab-reddit{border-color:#992900}.saboxplugin-socials.sabox-colored .saboxplugin-icon-color .sab-rss{border-color:#a43b0a}.saboxplugin-socials.sabox-colored .saboxplugin-icon-color .sab-sharethis{border-color:#5d8420}.saboxplugin-socials.sabox-colored .saboxplugin-icon-color .sab-skype{border-color:#00658a}.saboxplugin-socials.sabox-colored .saboxplugin-icon-color .sab-soundcloud{border-color:#995200}.saboxplugin-socials.sabox-colored .saboxplugin-icon-color .sab-spotify{border-color:#0f612c}.saboxplugin-socials.sabox-colored .saboxplugin-icon-color .sab-stackoverflow{border-color:#a95009}.saboxplugin-socials.sabox-colored .saboxplugin-icon-color .sab-steam{border-color:#006388}.saboxplugin-socials.sabox-colored .saboxplugin-icon-color .sab-user_email{border-color:#b84e05}.saboxplugin-socials.sabox-colored .saboxplugin-icon-color .sab-stumbleUpon{border-color:#9b280e}.saboxplugin-socials.sabox-colored .saboxplugin-icon-color .sab-tumblr{border-color:#10151b}.saboxplugin-socials.sabox-colored .saboxplugin-icon-color .sab-twitter{border-color:#0967a0}.saboxplugin-socials.sabox-colored .saboxplugin-icon-color .sab-vimeo{border-color:#0d7091}.saboxplugin-socials.sabox-colored .saboxplugin-icon-color .sab-windows{border-color:#003f71}.saboxplugin-socials.sabox-colored .saboxplugin-icon-color .sab-whatsapp{border-color:#003f71}.saboxplugin-socials.sabox-colored .saboxplugin-icon-color .sab-wordpress{border-color:#0f3647}.saboxplugin-socials.sabox-colored .saboxplugin-icon-color .sab-yahoo{border-color:#14002d}.saboxplugin-socials.sabox-colored .saboxplugin-icon-color .sab-youtube{border-color:#900}.saboxplugin-socials.sabox-colored .saboxplugin-icon-color .sab-xing{border-color:#000202}.saboxplugin-socials.sabox-colored .saboxplugin-icon-color .sab-mixcloud{border-color:#2475a0}.saboxplugin-socials.sabox-colored .saboxplugin-icon-color .sab-vk{border-color:#243549}.saboxplugin-socials.sabox-colored .saboxplugin-icon-color .sab-medium{border-color:#00452c}.saboxplugin-socials.sabox-colored .saboxplugin-icon-color .sab-quora{border-color:#420e00}.saboxplugin-socials.sabox-colored .saboxplugin-icon-color .sab-meetup{border-color:#9b181c}.saboxplugin-socials.sabox-colored .saboxplugin-icon-color .sab-goodreads{border-color:#000}.saboxplugin-socials.sabox-colored .saboxplugin-icon-color .sab-snapchat{border-color:#999700}.saboxplugin-socials.sabox-colored .saboxplugin-icon-color .sab-500px{border-color:#00557f}.saboxplugin-socials.sabox-colored .saboxplugin-icon-color .sab-mastodont{border-color:#185886}.sabox-plus-item{margin-bottom:20px}@media screen and (max-width:480px){.saboxplugin-wrap{text-align:center}.saboxplugin-wrap .saboxplugin-gravatar{float:none;padding:20px 0;text-align:center;margin:0 auto;display:block}.saboxplugin-wrap .saboxplugin-gravatar img{float:none;display:inline-block;display:-moz-inline-stack;vertical-align:middle;zoom:1}.saboxplugin-wrap .saboxplugin-desc{margin:0 10px 20px;text-align:center}.saboxplugin-wrap .saboxplugin-authorname{text-align:center;margin:10px 0 20px}}body .saboxplugin-authorname a,body .saboxplugin-authorname a:hover{box-shadow:none;-webkit-box-shadow:none}a.sab-profile-edit{font-size:16px!important;line-height:1!important}.sab-edit-settings a,a.sab-profile-edit{color:#0073aa!important;box-shadow:none!important;-webkit-box-shadow:none!important}.sab-edit-settings{margin-right:15px;position:absolute;right:0;z-index:2;bottom:10px;line-height:20px}.sab-edit-settings i{margin-left:5px}.saboxplugin-socials{line-height:1!important}.rtl .saboxplugin-wrap .saboxplugin-gravatar{float:right}.rtl .saboxplugin-wrap .saboxplugin-authorname{display:flex;align-items:center}.rtl .saboxplugin-wrap .saboxplugin-authorname .sab-profile-edit{margin-right:10px}.rtl .sab-edit-settings{right:auto;left:0}img.sab-custom-avatar{max-width:75px;}.saboxplugin-wrap .saboxplugin-gravatar img {-webkit-border-radius:50%;-moz-border-radius:50%;-ms-border-radius:50%;-o-border-radius:50%;border-radius:50%;}.saboxplugin-wrap .saboxplugin-gravatar img {-webkit-border-radius:50%;-moz-border-radius:50%;-ms-border-radius:50%;-o-border-radius:50%;border-radius:50%;}.saboxplugin-wrap .saboxplugin-gravatar img {-webkit-transition:all .5s ease;-moz-transition:all .5s ease;-o-transition:all .5s ease;transition:all .5s ease;}.saboxplugin-wrap .saboxplugin-gravatar img:hover {-webkit-transform:rotate(45deg);-moz-transform:rotate(45deg);-o-transform:rotate(45deg);-ms-transform:rotate(45deg);transform:rotate(45deg);}.saboxplugin-wrap {margin-top:0px; margin-bottom:0px; padding: 0px 0px }.saboxplugin-wrap .saboxplugin-authorname {font-size:18px; line-height:25px;}.saboxplugin-wrap .saboxplugin-desc p, .saboxplugin-wrap .saboxplugin-desc {font-size:14px !important; line-height:21px !important;}.saboxplugin-wrap .saboxplugin-web {font-size:14px;}.saboxplugin-wrap .saboxplugin-socials a svg {width:18px;height:18px;}</style> <script type="text/javascript">'use strict';var avia_is_mobile=!1;if(/Android|webOS|iPhone|iPad|iPod|BlackBerry|IEMobile|Opera Mini/i.test(navigator.userAgent)&&'ontouchstart' in document.documentElement){avia_is_mobile=!0;document.documentElement.className+=' avia_mobile '} else{document.documentElement.className+=' avia_desktop '};document.documentElement.className+=' js_active ';(function(){var e=['-webkit-','-moz-','-ms-',''],n='',o=!1,a=!1;for(var t in e){if(e[t]+'transform' in document.documentElement.style){o=!0;n=e[t]+'transform'};if(e[t]+'perspective' in document.documentElement.style){a=!0}};if(o){document.documentElement.className+=' avia_transform '};if(a){document.documentElement.className+=' avia_transform3d '};if(typeof document.getElementsByClassName=='function'&&typeof document.documentElement.getBoundingClientRect=='function'&&avia_is_mobile==!1){if(n&&window.innerHeight>0){setTimeout(function(){var e=0,o={},a=0,t=document.getElementsByClassName('av-parallax'),i=window.pageYOffset||document.documentElement.scrollTop;for(e=0;e<t.length;e++){t[e].style.top='0px';o=t[e].getBoundingClientRect();a=Math.ceil((window.innerHeight+i-o.top)*0.3);t[e].style[n]='translate(0px, '+a+'px)';t[e].style.top='auto';t[e].className+=' enabled-parallax '}},50)}}})();</script><style type="text/css">@font-face {font-family: 'entypo-fontello'; font-weight: normal; font-style: normal; font-display: swap; src: url('https://www.physicsforums.com/insights/wp-content/themes/enfold/config-templatebuilder/avia-template-builder/assets/fonts/entypo-fontello.woff2') format('woff2'), url('https://www.physicsforums.com/insights/wp-content/themes/enfold/config-templatebuilder/avia-template-builder/assets/fonts/entypo-fontello.woff') format('woff'), url('https://www.physicsforums.com/insights/wp-content/themes/enfold/config-templatebuilder/avia-template-builder/assets/fonts/entypo-fontello.ttf') format('truetype'), url('https://www.physicsforums.com/insights/wp-content/themes/enfold/config-templatebuilder/avia-template-builder/assets/fonts/entypo-fontello.svg#entypo-fontello') format('svg'), url('https://www.physicsforums.com/insights/wp-content/themes/enfold/config-templatebuilder/avia-template-builder/assets/fonts/entypo-fontello.eot'), url('https://www.physicsforums.com/insights/wp-content/themes/enfold/config-templatebuilder/avia-template-builder/assets/fonts/entypo-fontello.eot?#iefix') format('embedded-opentype'); } #top .avia-font-entypo-fontello, body .avia-font-entypo-fontello, html body [data-av_iconfont='entypo-fontello']:before{ font-family: 'entypo-fontello'; }</style></head><body id="top" class="post-template-default single single-post postid-951 single-format-standard stretched avia-mobile-no-animations rtl_columns av-curtain-numeric arial-websave arial avia-responsive-images-support" itemscope="itemscope" itemtype="https://schema.org/WebPage" ><div id='wrap_all'><header id='header' class='all_colors header_color light_bg_color av_header_top av_logo_left av_main_nav_header av_menu_right av_custom av_header_sticky av_header_shrinking_disabled av_header_stretch_disabled av_mobile_menu_phone av_header_searchicon av_header_unstick_top_disabled av_bottom_nav_disabled av_header_border_disabled' aria-label="Header" data-av_shrink_factor='50' role="banner" itemscope="itemscope" itemtype="https://schema.org/WPHeader" ><div id='header_main' class='container_wrap container_wrap_logo'><div class='container av-logo-container'><div class='inner-container'><span class='logo avia-standard-logo'><a href='https://www.physicsforums.com/insights/' class='' aria-label='Physics_Forums_Insights_logo' title='Physics_Forums_Insights_logo'><img data-lazyloaded="1" src="data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIzMDAiIGhlaWdodD0iMTAwIiB2aWV3Qm94PSIwIDAgMzAwIDEwMCI+PHJlY3Qgd2lkdGg9IjEwMCUiIGhlaWdodD0iMTAwJSIgZmlsbD0iI2NmZDRkYiIvPjwvc3ZnPg==" data-src="https://www.physicsforums.com/insights/wp-content/uploads/2019/02/Physics_Forums_Insights_logo.png" height="100" width="300" alt='Physics Forums Insights' title='Physics_Forums_Insights_logo' /><noscript><img src="https://www.physicsforums.com/insights/wp-content/uploads/2019/02/Physics_Forums_Insights_logo.png" height="100" width="300" alt='Physics Forums Insights' title='Physics_Forums_Insights_logo' /></noscript></a></span><nav class='main_menu' data-selectname='Select a page' role="navigation" itemscope="itemscope" itemtype="https://schema.org/SiteNavigationElement" ><div class="avia-menu av-main-nav-wrap"><ul role="menu" class="menu av-main-nav" id="avia-menu"><li role="menuitem" id="menu-item-27276" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-has-children menu-item-top-level menu-item-top-level-1"><a href="https://www.physicsforums.com/insights/trending-physics-articles/" itemprop="url" tabindex="0"><span class="avia-bullet"></span><span class="avia-menu-text">Physics</span><span class="avia-menu-fx"><span class="avia-arrow-wrap"><span class="avia-arrow"></span></span></span></a><ul class="sub-menu"><li role="menuitem" id="menu-item-26559" class="menu-item menu-item-type-taxonomy menu-item-object-category"><a href="https://www.physicsforums.com/insights/science-math-articles/physics-articles/" itemprop="url" tabindex="0"><span class="avia-bullet"></span><span class="avia-menu-text">Physics Articles</span></a></li><li role="menuitem" id="menu-item-26568" class="menu-item menu-item-type-taxonomy menu-item-object-category"><a href="https://www.physicsforums.com/insights/science-math-tutorials/physics-tutorials/" itemprop="url" tabindex="0"><span class="avia-bullet"></span><span class="avia-menu-text">Physics Tutorials</span></a></li><li role="menuitem" id="menu-item-26564" class="menu-item menu-item-type-taxonomy menu-item-object-category"><a href="https://www.physicsforums.com/insights/science-math-guides/physics-guides/" itemprop="url" tabindex="0"><span class="avia-bullet"></span><span class="avia-menu-text">Physics Guides</span></a></li><li role="menuitem" id="menu-item-26561" class="menu-item menu-item-type-taxonomy menu-item-object-category"><a href="https://www.physicsforums.com/insights/science-math-faqs/physics-faqs/" itemprop="url" tabindex="0"><span class="avia-bullet"></span><span class="avia-menu-text">Physics FAQs</span></a></li></ul></li><li role="menuitem" id="menu-item-27288" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-has-children menu-item-top-level menu-item-top-level-2"><a href="https://www.physicsforums.com/insights/trending-math-articles/" itemprop="url" tabindex="0"><span class="avia-bullet"></span><span class="avia-menu-text">Math</span><span class="avia-menu-fx"><span class="avia-arrow-wrap"><span class="avia-arrow"></span></span></span></a><ul class="sub-menu"><li role="menuitem" id="menu-item-26558" class="menu-item menu-item-type-taxonomy menu-item-object-category"><a href="https://www.physicsforums.com/insights/science-math-articles/math-articles/" itemprop="url" tabindex="0"><span class="avia-bullet"></span><span class="avia-menu-text">Math Articles</span></a></li><li role="menuitem" id="menu-item-26567" class="menu-item menu-item-type-taxonomy menu-item-object-category"><a href="https://www.physicsforums.com/insights/science-math-tutorials/math-tutorials/" itemprop="url" tabindex="0"><span class="avia-bullet"></span><span class="avia-menu-text">Math Tutorials</span></a></li><li role="menuitem" id="menu-item-26563" class="menu-item menu-item-type-taxonomy menu-item-object-category"><a href="https://www.physicsforums.com/insights/science-math-guides/math-guides/" itemprop="url" tabindex="0"><span class="avia-bullet"></span><span class="avia-menu-text">Math Guides</span></a></li><li role="menuitem" id="menu-item-26560" class="menu-item menu-item-type-taxonomy menu-item-object-category"><a href="https://www.physicsforums.com/insights/science-math-faqs/math-faqs/" itemprop="url" tabindex="0"><span class="avia-bullet"></span><span class="avia-menu-text">Math FAQs</span></a></li></ul></li><li role="menuitem" id="menu-item-27287" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-has-children menu-item-top-level menu-item-top-level-3"><a href="https://www.physicsforums.com/insights/trending-bio-chem-tech-articles/" itemprop="url" tabindex="0"><span class="avia-bullet"></span><span class="avia-menu-text">Bio/Chem/Tech</span><span class="avia-menu-fx"><span class="avia-arrow-wrap"><span class="avia-arrow"></span></span></span></a><ul class="sub-menu"><li role="menuitem" id="menu-item-26556" class="menu-item menu-item-type-taxonomy menu-item-object-category"><a href="https://www.physicsforums.com/insights/science-math-articles/biology-chemistry-articles/" itemprop="url" tabindex="0"><span class="avia-bullet"></span><span class="avia-menu-text">Bio/Chem Articles</span></a></li><li role="menuitem" id="menu-item-26566" class="menu-item menu-item-type-taxonomy menu-item-object-category"><a href="https://www.physicsforums.com/insights/science-math-tutorials/computer-science-tutorials/" itemprop="url" tabindex="0"><span class="avia-bullet"></span><span class="avia-menu-text">Computer Science Tutorials</span></a></li><li role="menuitem" id="menu-item-26565" class="menu-item menu-item-type-taxonomy menu-item-object-category"><a href="https://www.physicsforums.com/insights/science-math-guides/technology-guides/" itemprop="url" tabindex="0"><span class="avia-bullet"></span><span class="avia-menu-text">Technology Guides</span></a></li></ul></li><li role="menuitem" id="menu-item-27286" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-has-children menu-item-top-level menu-item-top-level-4"><a href="https://www.physicsforums.com/insights/trending-education-articles/" itemprop="url" tabindex="0"><span class="avia-bullet"></span><span class="avia-menu-text">Education</span><span class="avia-menu-fx"><span class="avia-arrow-wrap"><span class="avia-arrow"></span></span></span></a><ul class="sub-menu"><li role="menuitem" id="menu-item-26557" class="menu-item menu-item-type-taxonomy menu-item-object-category"><a href="https://www.physicsforums.com/insights/science-math-articles/education-articles/" itemprop="url" tabindex="0"><span class="avia-bullet"></span><span class="avia-menu-text">Education Articles</span></a></li><li role="menuitem" id="menu-item-26562" class="menu-item menu-item-type-taxonomy menu-item-object-category"><a href="https://www.physicsforums.com/insights/science-math-guides/education-guides/" itemprop="url" tabindex="0"><span class="avia-bullet"></span><span class="avia-menu-text">Education Guides</span></a></li></ul></li><li role="menuitem" id="menu-item-26569" class="menu-item menu-item-type-taxonomy menu-item-object-category menu-item-top-level menu-item-top-level-5"><a href="https://www.physicsforums.com/insights/scientist-interviews/" itemprop="url" tabindex="0"><span class="avia-bullet"></span><span class="avia-menu-text">Interviews</span><span class="avia-menu-fx"><span class="avia-arrow-wrap"><span class="avia-arrow"></span></span></span></a></li><li role="menuitem" id="menu-item-26570" class="menu-item menu-item-type-taxonomy menu-item-object-category current-post-ancestor current-menu-parent current-post-parent menu-item-top-level menu-item-top-level-6"><a href="https://www.physicsforums.com/insights/science-math-quizzes/" itemprop="url" tabindex="0"><span class="avia-bullet"></span><span class="avia-menu-text">Quizzes</span><span class="avia-menu-fx"><span class="avia-arrow-wrap"><span class="avia-arrow"></span></span></span></a></li><li role="menuitem" id="menu-item-26571" class="menu-item menu-item-type-custom menu-item-object-custom menu-item-top-level menu-item-top-level-7"><a href="https://www.physicsforums.com/" itemprop="url" tabindex="0"><span class="avia-bullet"></span><span class="avia-menu-text">Forums</span><span class="avia-menu-fx"><span class="avia-arrow-wrap"><span class="avia-arrow"></span></span></span></a></li><li id="menu-item-search" class="noMobile menu-item menu-item-search-dropdown menu-item-avia-special" role="menuitem"><a aria-label="Search" href="?s=" rel="nofollow" data-avia-search-tooltip=" <search> <form role="search" action="https://www.physicsforums.com/insights/" id="searchform" method="get" class=""> <div> <input type="submit" value="" id="searchsubmit" class="button avia-font-entypo-fontello" title="Enter at least 3 characters to show search results in a dropdown or click to route to search result page to show all results" /> <input type="search" id="s" name="s" value="" aria-label='Search' placeholder='Search' required /> </div> </form> </search> " aria-hidden='false' data-av_icon='' data-av_iconfont='entypo-fontello'><span class="avia_hidden_link_text">Search</span></a></li><li class="av-burger-menu-main menu-item-avia-special " role="menuitem"> <a href="#" aria-label="Menu" aria-hidden="false"> <span class="av-hamburger av-hamburger--spin av-js-hamburger"> <span class="av-hamburger-box"> <span class="av-hamburger-inner"></span> <strong>Menu</strong> </span> </span> <span class="avia_hidden_link_text">Menu</span> </a></li></ul></div></nav></div></div></div><div class="header_bg"></div></header><div id='main' class='all_colors' data-scroll-offset='70'><div class='container_wrap container_wrap_first main_color sidebar_right'><div class='container template-blog template-single-blog '><main class='content units av-content-small alpha av-blog-meta-html-info-disabled av-main-single' role="main" itemscope="itemscope" itemtype="https://schema.org/Blog" ><article class="post-entry post-entry-type-standard post-entry-951 post-loop-1 post-parity-odd post-entry-last single-big with-slider post-951 post type-post status-publish format-standard has-post-thumbnail hentry category-science-math-quizzes tag-interview" itemscope="itemscope" itemtype="https://schema.org/BlogPosting" itemprop="blogPost" ><div class="big-preview single-big" itemprop="image" itemscope="itemscope" itemtype="https://schema.org/ImageObject" ><a href="https://www.physicsforums.com/insights/wp-content/uploads/2015/05/feynman_quiz.png" title="feynman_quiz" ><img data-lazyloaded="1" src="data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIyNDAiIGhlaWdodD0iMTM1IiB2aWV3Qm94PSIwIDAgMjQwIDEzNSI+PHJlY3Qgd2lkdGg9IjEwMCUiIGhlaWdodD0iMTAwJSIgZmlsbD0iI2NmZDRkYiIvPjwvc3ZnPg==" loading="lazy" width="240" height="135" data-src="https://www.physicsforums.com/insights/wp-content/uploads/2015/05/feynman_quiz.png" class="wp-image-954 avia-img-lazy-loading-954 attachment-entry_with_sidebar size-entry_with_sidebar wp-post-image" alt="Richard Feynman" decoding="async" /><noscript><img loading="lazy" width="240" height="135" src="https://www.physicsforums.com/insights/wp-content/uploads/2015/05/feynman_quiz.png" class="wp-image-954 avia-img-lazy-loading-954 attachment-entry_with_sidebar size-entry_with_sidebar wp-post-image" alt="Richard Feynman" decoding="async" /></noscript></a></div><div class="blog-meta"></div><div class='entry-content-wrapper clearfix standard-content'><header class="entry-content-header" aria-label="Post: Richard Feynman Quiz: Think You Know Richard Feynman?"><h1 class='post-title entry-title ' itemprop="headline" >Richard Feynman Quiz: Think You Know Richard Feynman?<span class="post-format-icon minor-meta"></span></h1><span class="post-meta-infos"><time class="date-container minor-meta updated" itemprop="datePublished" datetime="2015-05-05T18:40:09-05:00" >May 5, 2015</time><span class="text-sep">/</span><span class="comment-container minor-meta"><a href="https://www.physicsforums.com/insights/think-know-richard-feynman/#comments" class="comments-link" >74 Comments</a></span><span class="text-sep">/</span><span class="blog-categories minor-meta">in <a href="https://www.physicsforums.com/insights/science-math-quizzes/" rel="tag">Quizzes</a></span><span class="text-sep">/</span><span class="blog-author minor-meta">by <span class="entry-author-link" itemprop="author" ><span class="author"><span class="fn"><a href="https://www.physicsforums.com/insights/author/greg-bernhardt/" title="Posts by Greg Bernhardt" rel="author">Greg Bernhardt</a></span></span></span></span></span></header><div class="entry-content" itemprop="text" ><div><strong>Estimated Read Time:</strong> 2 minute(s)</div><div><strong>Common Topics:</strong> feynman, quantum, richard, electrodynamics, teaching</div><div><p id="firstHeading" class="firstHeading" lang="en"><a href="https://en.wikipedia.org/wiki/Richard_Feynman" target="_blank">Richard Feynman</a> is one of the most popular and highly regarded physicists of all time. You think you may know him, but do you? Let’s find out by taking this quiz!</p><article class='iconbox iconbox_top av-ewppz-0f7db2e83815aa31bbb76c2d227dc940 avia-builder-el-0 avia-builder-el-no-sibling main_color' itemscope="itemscope" itemtype="https://schema.org/BlogPosting" itemprop="blogPost" ><div class="iconbox_content"><header class="entry-content-header" aria-label="Icon: Richard P. Feynman"><div class="iconbox_icon heading-color" aria-hidden='true' data-av_icon='' data-av_iconfont='entypo-fontello'></div><div id="ez-toc-container" class="ez-toc-v2_0_72 counter-hierarchy ez-toc-counter ez-toc-custom ez-toc-container-direction"><p class="ez-toc-title" style="cursor:inherit">Table of Contents</p> <label for="ez-toc-cssicon-toggle-item-67b3fc2ac275c" class="ez-toc-cssicon-toggle-label"><span class="ez-toc-cssicon"><span class="eztoc-hide" style="display:none;">Toggle</span><span class="ez-toc-icon-toggle-span"><svg style="fill: #4c4c4c;color:#4c4c4c" xmlns="http://www.w3.org/2000/svg" class="list-377408" width="20px" height="20px" viewBox="0 0 24 24" fill="none"><path d="M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z" fill="currentColor"></path></svg><svg style="fill: #4c4c4c;color:#4c4c4c" class="arrow-unsorted-368013" xmlns="http://www.w3.org/2000/svg" width="10px" height="10px" viewBox="0 0 24 24" version="1.2" baseProfile="tiny"><path d="M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z"/></svg></span></span></label><input type="checkbox" id="ez-toc-cssicon-toggle-item-67b3fc2ac275c" aria-label="Toggle" /><nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class="ez-toc-link ez-toc-heading-1" href="#Richard-P-Feynman" title="Richard P. Feynman">Richard P. Feynman</a></li></ul></li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class="ez-toc-link ez-toc-heading-2" href="#1-Who-was-Richard-Feynman" title="1. Who was Richard Feynman?">1. Who was Richard Feynman?</a></li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class="ez-toc-link ez-toc-heading-3" href="#2-What-is-Richard-Feynman-most-famous-for" title="2. What is Richard Feynman most famous for?">2. What is Richard Feynman most famous for?</a></li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class="ez-toc-link ez-toc-heading-4" href="#3-Did-Richard-Feynman-contribute-to-the-Manhattan-Project" title="3. Did Richard Feynman contribute to the Manhattan Project?">3. Did Richard Feynman contribute to the Manhattan Project?</a></li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class="ez-toc-link ez-toc-heading-5" href="#4-What-are-Feynmans-notable-publications" title="4. What are Feynman’s notable publications?">4. What are Feynman’s notable publications?</a></li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class="ez-toc-link ez-toc-heading-6" href="#5-What-was-Richard-Feynmans-teaching-philosophy" title="5. What was Richard Feynman’s teaching philosophy?">5. What was Richard Feynman’s teaching philosophy?</a></li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class="ez-toc-link ez-toc-heading-7" href="#6-How-did-Richard-Feynman-impact-the-field-of-physics" title="6. How did Richard Feynman impact the field of physics?">6. How did Richard Feynman impact the field of physics?</a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class="ez-toc-link ez-toc-heading-8" href="#More-Related-Articles" title="More Related Articles">More Related Articles</a></li></ul></li></ul></nav></div><h3 class='iconbox_content_title ' itemprop="headline" ><span class="ez-toc-section" id="Richard-P-Feynman"></span>Richard P. Feynman<span class="ez-toc-section-end"></span></h3></header><div class='iconbox_content_container ' itemprop="text" ><p>Nobody ever figures out what life is all about, and it doesn’t matter. Explore the world. Nearly everything is really interesting if you go into it deeply enough.</p></div></div><footer class="entry-footer"></footer></article><div id="watu_quiz" class="quiz-area single-page-quiz"><form action="" method="post" class="quiz-form " id="quiz-3" onsubmit="return Watu.submitResult(this)"><div class='watu-question' id='question-1'><div class='question-content'><p><span class='watu_num'>1. </span>Feynman loved travelling to</p></div><input type='hidden' name='question_id[]' value='16' /><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='107' /><div class='watu-question-choice'><input type='radio' name='answer-16[]' id='answer-id-107' class='answer answer-1 answerof-16' value='107' /> <label for='answer-id-107' id='answer-label-107' class=' answer label-1'><span class='answer'>Panama</span></label></div> <input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='108' /><div class='watu-question-choice'><input type='radio' name='answer-16[]' id='answer-id-108' class='answer answer-1 answerof-16' value='108' /> <label for='answer-id-108' id='answer-label-108' class=' answer label-1'><span class='answer'>Brazil</span></label></div> <input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='109' /><div class='watu-question-choice'><input type='radio' name='answer-16[]' id='answer-id-109' class='answer answer-1 answerof-16' value='109' /> <label for='answer-id-109' id='answer-label-109' class=' answer label-1'><span class='answer'>Mexico</span></label></div> <input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='110' /><div class='watu-question-choice'><input type='radio' name='answer-16[]' id='answer-id-110' class='answer answer-1 answerof-16' value='110' /> <label for='answer-id-110' id='answer-label-110' class=' answer label-1'><span class='answer'>Bahamas</span></label></div></div><input type='hidden' id='questionType1' value='radio' class=''></div><div class='watu-question' id='question-2'><div class='question-content'><p><span class='watu_num'>2. </span>Besides science, Feynman had a passion for</p></div><input type='hidden' name='question_id[]' value='17' /><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='111' /><div class='watu-question-choice'><input type='radio' name='answer-17[]' id='answer-id-111' class='answer answer-2 answerof-17' value='111' /> <label for='answer-id-111' id='answer-label-111' class=' answer label-2'><span class='answer'>Painting</span></label></div> <input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='112' /><div class='watu-question-choice'><input type='radio' name='answer-17[]' id='answer-id-112' class='answer answer-2 answerof-17' value='112' /> <label for='answer-id-112' id='answer-label-112' class=' answer label-2'><span class='answer'>Swimming</span></label></div> <input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='113' /><div class='watu-question-choice'><input type='radio' name='answer-17[]' id='answer-id-113' class='answer answer-2 answerof-17' value='113' /> <label for='answer-id-113' id='answer-label-113' class=' answer label-2'><span class='answer'>Poetry</span></label></div> <input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='114' /><div class='watu-question-choice'><input type='radio' name='answer-17[]' id='answer-id-114' class='answer answer-2 answerof-17' value='114' /> <label for='answer-id-114' id='answer-label-114' class=' answer label-2'><span class='answer'>Guitar</span></label></div></div><input type='hidden' id='questionType2' value='radio' class=''></div><div class='watu-question' id='question-3'><div class='question-content'><p><span class='watu_num'>3. </span>Feynman had a minor role in a movie called <em>Anti-Clock </em>where he played a</p></div><input type='hidden' name='question_id[]' value='18' /><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='115' /><div class='watu-question-choice'><input type='radio' name='answer-18[]' id='answer-id-115' class='answer answer-3 answerof-18' value='115' /> <label for='answer-id-115' id='answer-label-115' class=' answer label-3'><span class='answer'>Barber</span></label></div> <input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='116' /><div class='watu-question-choice'><input type='radio' name='answer-18[]' id='answer-id-116' class='answer answer-3 answerof-18' value='116' /> <label for='answer-id-116' id='answer-label-116' class=' answer label-3'><span class='answer'>Professor</span></label></div> <input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='117' /><div class='watu-question-choice'><input type='radio' name='answer-18[]' id='answer-id-117' class='answer answer-3 answerof-18' value='117' /> <label for='answer-id-117' id='answer-label-117' class=' answer label-3'><span class='answer'>Journalist</span></label></div> <input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='118' /><div class='watu-question-choice'><input type='radio' name='answer-18[]' id='answer-id-118' class='answer answer-3 answerof-18' value='118' /> <label for='answer-id-118' id='answer-label-118' class=' answer label-3'><span class='answer'>Accountant</span></label></div></div><input type='hidden' id='questionType3' value='radio' class=''></div><div class='watu-question' id='question-4'><div class='question-content'><p><span class='watu_num'>4. </span>Feynman had a younger sister who’s name was</p></div><input type='hidden' name='question_id[]' value='19' /><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='119' /><div class='watu-question-choice'><input type='radio' name='answer-19[]' id='answer-id-119' class='answer answer-4 answerof-19' value='119' /> <label for='answer-id-119' id='answer-label-119' class=' answer label-4'><span class='answer'>Karen</span></label></div> <input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='120' /><div class='watu-question-choice'><input type='radio' name='answer-19[]' id='answer-id-120' class='answer answer-4 answerof-19' value='120' /> <label for='answer-id-120' id='answer-label-120' class=' answer label-4'><span class='answer'>Susan</span></label></div> <input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='121' /><div class='watu-question-choice'><input type='radio' name='answer-19[]' id='answer-id-121' class='answer answer-4 answerof-19' value='121' /> <label for='answer-id-121' id='answer-label-121' class=' answer label-4'><span class='answer'>Mary</span></label></div> <input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='122' /><div class='watu-question-choice'><input type='radio' name='answer-19[]' id='answer-id-122' class='answer answer-4 answerof-19' value='122' /> <label for='answer-id-122' id='answer-label-122' class=' answer label-4'><span class='answer'>Joan</span></label></div></div><input type='hidden' id='questionType4' value='radio' class=''></div><div class='watu-question' id='question-5'><div class='question-content'><p><span class='watu_num'>5. </span>Feynman said he had the condition</p></div><input type='hidden' name='question_id[]' value='20' /><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='155' /><div class='watu-question-choice'><input type='radio' name='answer-20[]' id='answer-id-155' class='answer answer-5 answerof-20' value='155' /> <label for='answer-id-155' id='answer-label-155' class=' answer label-5'><span class='answer'>ADHD</span></label></div> <input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='156' /><div class='watu-question-choice'><input type='radio' name='answer-20[]' id='answer-id-156' class='answer answer-5 answerof-20' value='156' /> <label for='answer-id-156' id='answer-label-156' class=' answer label-5'><span class='answer'>Synaesthesia</span></label></div> <input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='157' /><div class='watu-question-choice'><input type='radio' name='answer-20[]' id='answer-id-157' class='answer answer-5 answerof-20' value='157' /> <label for='answer-id-157' id='answer-label-157' class=' answer label-5'><span class='answer'>Anemia</span></label></div> <input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='158' /><div class='watu-question-choice'><input type='radio' name='answer-20[]' id='answer-id-158' class='answer answer-5 answerof-20' value='158' /> <label for='answer-id-158' id='answer-label-158' class=' answer label-5'><span class='answer'>Insomnia</span></label></div></div><input type='hidden' id='questionType5' value='radio' class=''></div><div class='watu-question' id='question-6'><div class='question-content'><p><span class='watu_num'>6. </span>Feynman had a ____ decorated in his famous diagrams</p></div><input type='hidden' name='question_id[]' value='21' /><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='127' /><div class='watu-question-choice'><input type='radio' name='answer-21[]' id='answer-id-127' class='answer answer-6 answerof-21' value='127' /> <label for='answer-id-127' id='answer-label-127' class=' answer label-6'><span class='answer'>Van</span></label></div> <input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='128' /><div class='watu-question-choice'><input type='radio' name='answer-21[]' id='answer-id-128' class='answer answer-6 answerof-21' value='128' /> <label for='answer-id-128' id='answer-label-128' class=' answer label-6'><span class='answer'>Wall</span></label></div> <input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='129' /><div class='watu-question-choice'><input type='radio' name='answer-21[]' id='answer-id-129' class='answer answer-6 answerof-21' value='129' /> <label for='answer-id-129' id='answer-label-129' class=' answer label-6'><span class='answer'>Door</span></label></div> <input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='130' /><div class='watu-question-choice'><input type='radio' name='answer-21[]' id='answer-id-130' class='answer answer-6 answerof-21' value='130' /> <label for='answer-id-130' id='answer-label-130' class=' answer label-6'><span class='answer'>Floor</span></label></div></div><input type='hidden' id='questionType6' value='radio' class=''></div><div class='watu-question' id='question-7'><div class='question-content'><p><span class='watu_num'>7. </span>Who was his doctoral advisor</p></div><input type='hidden' name='question_id[]' value='22' /><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='131' /><div class='watu-question-choice'><input type='radio' name='answer-22[]' id='answer-id-131' class='answer answer-7 answerof-22' value='131' /> <label for='answer-id-131' id='answer-label-131' class=' answer label-7'><span class='answer'>Donald Glaser</span></label></div> <input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='132' /><div class='watu-question-choice'><input type='radio' name='answer-22[]' id='answer-id-132' class='answer answer-7 answerof-22' value='132' /> <label for='answer-id-132' id='answer-label-132' class=' answer label-7'><span class='answer'>Robert Wilson</span></label></div> <input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='133' /><div class='watu-question-choice'><input type='radio' name='answer-22[]' id='answer-id-133' class='answer answer-7 answerof-22' value='133' /> <label for='answer-id-133' id='answer-label-133' class=' answer label-7'><span class='answer'>Mark Mills</span></label></div> <input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='134' /><div class='watu-question-choice'><input type='radio' name='answer-22[]' id='answer-id-134' class='answer answer-7 answerof-22' value='134' /> <label for='answer-id-134' id='answer-label-134' class=' answer label-7'><span class='answer'>John Wheeler</span></label></div></div><input type='hidden' id='questionType7' value='radio' class=''></div><div class='watu-question' id='question-8'><div class='question-content'><p><span class='watu_num'>8. </span>His IQ was estimated at</p></div><input type='hidden' name='question_id[]' value='23' /><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='135' /><div class='watu-question-choice'><input type='radio' name='answer-23[]' id='answer-id-135' class='answer answer-8 answerof-23' value='135' /> <label for='answer-id-135' id='answer-label-135' class=' answer label-8'><span class='answer'>115</span></label></div> <input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='136' /><div class='watu-question-choice'><input type='radio' name='answer-23[]' id='answer-id-136' class='answer answer-8 answerof-23' value='136' /> <label for='answer-id-136' id='answer-label-136' class=' answer label-8'><span class='answer'>120</span></label></div> <input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='137' /><div class='watu-question-choice'><input type='radio' name='answer-23[]' id='answer-id-137' class='answer answer-8 answerof-23' value='137' /> <label for='answer-id-137' id='answer-label-137' class=' answer label-8'><span class='answer'>125</span></label></div> <input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='138' /><div class='watu-question-choice'><input type='radio' name='answer-23[]' id='answer-id-138' class='answer answer-8 answerof-23' value='138' /> <label for='answer-id-138' id='answer-label-138' class=' answer label-8'><span class='answer'>130</span></label></div></div><input type='hidden' id='questionType8' value='radio' class=''></div><div class='watu-question' id='question-9'><div class='question-content'><p><span class='watu_num'>9. </span>While bored working at Los Alamos he would</p></div><input type='hidden' name='question_id[]' value='24' /><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='139' /><div class='watu-question-choice'><input type='radio' name='answer-24[]' id='answer-id-139' class='answer answer-9 answerof-24' value='139' /> <label for='answer-id-139' id='answer-label-139' class=' answer label-9'><span class='answer'>Write stories</span></label></div> <input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='140' /><div class='watu-question-choice'><input type='radio' name='answer-24[]' id='answer-id-140' class='answer answer-9 answerof-24' value='140' /> <label for='answer-id-140' id='answer-label-140' class=' answer label-9'><span class='answer'>Play poker</span></label></div> <input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='141' /><div class='watu-question-choice'><input type='radio' name='answer-24[]' id='answer-id-141' class='answer answer-9 answerof-24' value='141' /> <label for='answer-id-141' id='answer-label-141' class=' answer label-9'><span class='answer'>Learn magic</span></label></div> <input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='142' /><div class='watu-question-choice'><input type='radio' name='answer-24[]' id='answer-id-142' class='answer answer-9 answerof-24' value='142' /> <label for='answer-id-142' id='answer-label-142' class=' answer label-9'><span class='answer'>Pick Locks</span></label></div></div><input type='hidden' id='questionType9' value='radio' class=''></div><div class='watu-question' id='question-10'><div class='question-content'><p><span class='watu_num'>10. </span>During his Challenger disaster invesigation NASA claimed there was a 1 in 100,000 chance of a catastrophic failure. Richard found out it was closer to</p></div><input type='hidden' name='question_id[]' value='25' /><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='143' /><div class='watu-question-choice'><input type='radio' name='answer-25[]' id='answer-id-143' class='answer answer-10 answerof-25' value='143' /> <label for='answer-id-143' id='answer-label-143' class=' answer label-10'><span class='answer'>1 in 100</span></label></div> <input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='144' /><div class='watu-question-choice'><input type='radio' name='answer-25[]' id='answer-id-144' class='answer answer-10 answerof-25' value='144' /> <label for='answer-id-144' id='answer-label-144' class=' answer label-10'><span class='answer'>1 in 200</span></label></div> <input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='145' /><div class='watu-question-choice'><input type='radio' name='answer-25[]' id='answer-id-145' class='answer answer-10 answerof-25' value='145' /> <label for='answer-id-145' id='answer-label-145' class=' answer label-10'><span class='answer'>1 in 300</span></label></div> <input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='146' /><div class='watu-question-choice'><input type='radio' name='answer-25[]' id='answer-id-146' class='answer answer-10 answerof-25' value='146' /> <label for='answer-id-146' id='answer-label-146' class=' answer label-10'><span class='answer'>1 in 400</span></label></div></div><input type='hidden' id='questionType10' value='radio' class=''></div><div class='watu-question' id='question-11'><div class='question-content'><p><span class='watu_num'>11. </span>Which school did Richard teach at before he chose Caltech?</p></div><input type='hidden' name='question_id[]' value='26' /><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='147' /><div class='watu-question-choice'><input type='radio' name='answer-26[]' id='answer-id-147' class='answer answer-11 answerof-26' value='147' /> <label for='answer-id-147' id='answer-label-147' class=' answer label-11'><span class='answer'>Yale</span></label></div> <input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='148' /><div class='watu-question-choice'><input type='radio' name='answer-26[]' id='answer-id-148' class='answer answer-11 answerof-26' value='148' /> <label for='answer-id-148' id='answer-label-148' class=' answer label-11'><span class='answer'>MIT</span></label></div> <input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='149' /><div class='watu-question-choice'><input type='radio' name='answer-26[]' id='answer-id-149' class='answer answer-11 answerof-26' value='149' /> <label for='answer-id-149' id='answer-label-149' class=' answer label-11'><span class='answer'>Cornell</span></label></div> <input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='150' /><div class='watu-question-choice'><input type='radio' name='answer-26[]' id='answer-id-150' class='answer answer-11 answerof-26' value='150' /> <label for='answer-id-150' id='answer-label-150' class=' answer label-11'><span class='answer'>Princeton</span></label></div></div><input type='hidden' id='questionType11' value='radio' class=''></div><div class='watu-question' id='question-12'><div class='question-content'><p><span class='watu_num'>12. </span>In which year did Richard Feynman win the Nobel Prize in Physics?</p></div><input type='hidden' name='question_id[]' value='27' /><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='151' /><div class='watu-question-choice'><input type='radio' name='answer-27[]' id='answer-id-151' class='answer answer-12 answerof-27' value='151' /> <label for='answer-id-151' id='answer-label-151' class=' answer label-12'><span class='answer'>1969</span></label></div> <input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='152' /><div class='watu-question-choice'><input type='radio' name='answer-27[]' id='answer-id-152' class='answer answer-12 answerof-27' value='152' /> <label for='answer-id-152' id='answer-label-152' class=' answer label-12'><span class='answer'>1961</span></label></div> <input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='153' /><div class='watu-question-choice'><input type='radio' name='answer-27[]' id='answer-id-153' class='answer answer-12 answerof-27' value='153' /> <label for='answer-id-153' id='answer-label-153' class=' answer label-12'><span class='answer'>1962</span></label></div> <input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='154' /><div class='watu-question-choice'><input type='radio' name='answer-27[]' id='answer-id-154' class='answer answer-12 answerof-27' value='154' /> <label for='answer-id-154' id='answer-label-154' class=' answer label-12'><span class='answer'>1965</span></label></div></div><input type='hidden' id='questionType12' value='radio' class=''></div><div style='display:none' id='question-13'><br /><div class='question-content'><img data-lazyloaded="1" src="data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIxNiIgaGVpZ2h0PSIxNiIgdmlld0JveD0iMCAwIDE2IDE2Ij48cmVjdCB3aWR0aD0iMTAwJSIgaGVpZ2h0PSIxMDAlIiBmaWxsPSIjY2ZkNGRiIi8+PC9zdmc+" decoding="async" data-src="https://www.physicsforums.com/insights/wp-content/plugins/watu/loading.gif" width="16" height="16" alt="Loading ..." title="Loading ..." /><noscript><img decoding="async" src="https://www.physicsforums.com/insights/wp-content/plugins/watu/loading.gif" width="16" height="16" alt="Loading ..." title="Loading ..." /></noscript> Loading …</div></div><br /> <input type="submit" name="submit_no_ajax" id="action-button" class="watu-submit-button" value="Submit" /> <input type="hidden" name="no_ajax" value="1"><input type="hidden" name="do" value="show_exam_result"> <input type="hidden" name="post_id" value="951"> <input type="hidden" name="quiz_id" value="3" /> <input type="hidden" id="watuStartTime" name="start_time" value="2025-02-17 21:19:06" /></form></div><div id="watu-loading-result" style="display:none;"><p align="center"><img data-lazyloaded="1" src="data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIxNiIgaGVpZ2h0PSIxNiIgdmlld0JveD0iMCAwIDE2IDE2Ij48cmVjdCB3aWR0aD0iMTAwJSIgaGVpZ2h0PSIxMDAlIiBmaWxsPSIjY2ZkNGRiIi8+PC9zdmc+" decoding="async" data-src="https://www.physicsforums.com/insights/wp-content/plugins/watu/loading.gif" width="16" height="16" alt="Loading" title="Loading" /><noscript><img decoding="async" src="https://www.physicsforums.com/insights/wp-content/plugins/watu/loading.gif" width="16" height="16" alt="Loading" title="Loading" /></noscript></p></div> <script type="text/javascript">var exam_id=0; var question_ids=''; var watuURL=''; jQuery(function($){ question_ids = "16,17,18,19,20,21,22,23,24,25,26,27"; exam_id = 3; Watu.exam_id = exam_id; Watu.qArr = question_ids.split(','); Watu.post_id = 951; Watu.singlePage = '1'; Watu.hAppID = "0.77801200 1739848746"; watuURL = "https://www.physicsforums.com/insights/wp-admin/admin-ajax.php"; Watu.noAlertUnanswered = 0; });</script> <p>Ready for your next quiz? <a href="https://www.physicsforums.com/insights/think-know-stephen-hawkings/">How well do you know Stephen Hawking?</a></p><h2><span class="ez-toc-section" id="1-Who-was-Richard-Feynman"></span>1. Who was Richard Feynman?<span class="ez-toc-section-end"></span></h2><p>Richard Feynman was an American theoretical physicist renowned for his work in the path integral formulation of <a href="https://www.physicsforums.com/insights/schrodingers-cat-and-the-qbit/" data-wpil-monitor-id="21">quantum mechanics</a>, the theory of quantum electrodynamics, and the physics of superfluidity of supercooled liquid helium, as well as in particle physics for which he proposed the parton model. He was known for his distinctive teaching style and colorful personality.</p><h2><span class="ez-toc-section" id="2-What-is-Richard-Feynman-most-famous-for"></span>2. What is Richard Feynman most famous for?<span class="ez-toc-section-end"></span></h2><p>Feynman is most famous for his contributions to the development of quantum electrodynamics (QED). He introduced the Feynman diagrams, a graphical representation of the interactions of subatomic particles, which have become a fundamental tool in quantum physics. He shared the Nobel Prize in Physics in 1965 for his work in this field.</p><h2><span class="ez-toc-section" id="3-Did-Richard-Feynman-contribute-to-the-Manhattan-Project"></span>3. Did Richard Feynman contribute to the Manhattan Project?<span class="ez-toc-section-end"></span></h2><p>Yes, Richard Feynman was a key member of the Manhattan Project, the U.S. government research project during World War II that produced the first atomic bombs. He worked at the Los Alamos National Laboratory, where he made significant contributions to the development of the bomb.</p><h2><span class="ez-toc-section" id="4-What-are-Feynmans-notable-publications"></span>4. What are Feynman’s notable publications?<span class="ez-toc-section-end"></span></h2><p>Feynman’s notable publications include “The Feynman Lectures on Physics,” a comprehensive textbook based on lectures he gave at Caltech. His other works include “QED: The Strange Theory of Light and Matter,” which introduces quantum electrodynamics to a general audience, and “Surely You’re Joking, Mr. Feynman!” a book of anecdotes from his life.</p><h2><span class="ez-toc-section" id="5-What-was-Richard-Feynmans-teaching-philosophy"></span>5. What was Richard Feynman’s teaching philosophy?<span class="ez-toc-section-end"></span></h2><p>Feynman’s teaching philosophy was centered around making complex concepts accessible and engaging. He believed in the importance of understanding the fundamentals deeply rather than memorizing advanced topics. His teaching style was characterized by clarity, simplicity, and a bit of humor.</p><h2><span class="ez-toc-section" id="6-How-did-Richard-Feynman-impact-the-field-of-physics"></span>6. How did Richard Feynman impact the field of physics?<span class="ez-toc-section-end"></span></h2><p>Feynman significantly impacted physics through his work in quantum mechanics and quantum electrodynamics. His approaches and methods, such as Feynman diagrams, have become standard tools in theoretical physics. His contributions have influenced many areas of physics and have helped in simplifying and solving complex quantum physics problems.</p></div><div class="saboxplugin-wrap" itemtype="http://schema.org/Person" itemscope itemprop="author"><div class="saboxplugin-tab"><div class="saboxplugin-gravatar"></div><div class="saboxplugin-authorname"><a href="https://www.physicsforums.com/insights/author/greg-bernhardt/" class="vcard author" rel="author"><span class="fn">Greg Bernhardt</span></a></div><div class="saboxplugin-desc"><div itemprop="description"><p>I have a BS in Information Sciences from UW-Milwaukee. I’ve helped manage Physics Forums for over 22 years. I enjoy learning and discussing new scientific developments. STEM communication and policy are big interests as well. Currently a Sr. SEO Specialist at Shopify and writer at <a href="https://importsem.com/about-greg-bernhardt/">importsem.com</a></p></div></div><div class="clearfix"></div><div class="saboxplugin-socials "><a title="Facebook" target="_blank" href="https://www.facebook.com/physicsforums/" rel="nofollow noopener" class="saboxplugin-icon-grey"><svg aria-hidden="true" class="sab-facebook" role="img" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 264 512"><path fill="currentColor" d="M76.7 512V283H0v-91h76.7v-71.7C76.7 42.4 124.3 0 193.8 0c33.3 0 61.9 2.5 70.2 3.6V85h-48.2c-37.8 0-45.1 18-45.1 44.3V192H256l-11.7 91h-73.6v229"></path></svg></span></a></div></div></div><style>.lwrp.link-whisper-related-posts{ margin-top: 25px; margin-bottom: 25px; } .lwrp .lwrp-title{ }.lwrp .lwrp-description{ } .lwrp .lwrp-list-container{ } .lwrp .lwrp-list-multi-container{ display: flex; } .lwrp .lwrp-list-double{ width: 48%; } .lwrp .lwrp-list-triple{ width: 32%; } .lwrp .lwrp-list-row-container{ display: flex; justify-content: space-between; } .lwrp .lwrp-list-row-container .lwrp-list-item{ width: calc(33% - 20px); } .lwrp .lwrp-list-item:not(.lwrp-no-posts-message-item){ margin-bottom: 25px; } .lwrp .lwrp-list-item img{ max-width: 100%; height: auto; object-fit: cover; aspect-ratio: 1 / 1; } .lwrp .lwrp-list-item.lwrp-empty-list-item{ background: initial !important; } .lwrp .lwrp-list-item .lwrp-list-link .lwrp-list-link-title-text, .lwrp .lwrp-list-item .lwrp-list-no-posts-message{ }@media screen and (max-width: 480px) { .lwrp.link-whisper-related-posts{ } .lwrp .lwrp-title{ }.lwrp .lwrp-description{ } .lwrp .lwrp-list-multi-container{ flex-direction: column; } .lwrp .lwrp-list-multi-container ul.lwrp-list{ margin-top: 0px; margin-bottom: 0px; padding-top: 0px; padding-bottom: 0px; } .lwrp .lwrp-list-double, .lwrp .lwrp-list-triple{ width: 100%; } .lwrp .lwrp-list-row-container{ justify-content: initial; flex-direction: column; } .lwrp .lwrp-list-row-container .lwrp-list-item{ width: 100%; } .lwrp .lwrp-list-item:not(.lwrp-no-posts-message-item){ } .lwrp .lwrp-list-item .lwrp-list-link .lwrp-list-link-title-text, .lwrp .lwrp-list-item .lwrp-list-no-posts-message{ }; }</style><div id="link-whisper-related-posts-widget" class="link-whisper-related-posts lwrp"><h3 class="lwrp-title">More Related Articles</h3><div class="lwrp-list-container"><div class="lwrp-list-multi-container"><ul class="lwrp-list lwrp-list-double lwrp-list-left"><li class="lwrp-list-item"><a href="https://www.physicsforums.com/insights/think-know-stephen-hawkings/" class="lwrp-list-link"><span class="lwrp-list-link-title-text">Stephen Hawking Quiz: Think You Know Stephen Hawking?</span></a></li></ul><ul class="lwrp-list lwrp-list-double lwrp-list-right"><li class="lwrp-list-item"><a href="https://www.physicsforums.com/insights/how-well-do-you-know-albert-einstein/" class="lwrp-list-link"><span class="lwrp-list-link-title-text">Albert Einstein Quiz: How Well Do You Know Albert Einstein?</span></a></li></ul></div></div></div></div><footer class="entry-footer"><span class="blog-tags minor-meta"><strong>Tags:</strong><span> <a href="https://www.physicsforums.com/insights/tag/interview/" rel="tag">interview</a></span></span><div class='av-social-sharing-box av-social-sharing-box-default av-social-sharing-box-fullwidth'><div class="av-share-box"><h5 class='av-share-link-description av-no-toc '>Share this entry</h5><ul class="av-share-box-list noLightbox"><li class='av-share-link av-social-link-facebook' ><a target="_blank" aria-label="Share on Facebook" href='https://www.facebook.com/sharer.php?u=https://www.physicsforums.com/insights/think-know-richard-feynman/&t=Richard%20Feynman%20Quiz%3A%20Think%20You%20Know%20Richard%20Feynman%3F' aria-hidden='false' data-av_icon='' data-av_iconfont='entypo-fontello' title='' data-avia-related-tooltip='Share on Facebook' rel="noopener"><span class='avia_hidden_link_text'>Share on Facebook</span></a></li><li class='av-share-link av-social-link-twitter' ><a target="_blank" aria-label="Share on X" href='https://twitter.com/share?text=Richard%20Feynman%20Quiz%3A%20Think%20You%20Know%20Richard%20Feynman%3F&url=https://www.physicsforums.com/insights/?p=951' aria-hidden='false' data-av_icon='' data-av_iconfont='entypo-fontello' title='' data-avia-related-tooltip='Share on X' rel="noopener"><span class='avia_hidden_link_text'>Share on X</span></a></li><li class='av-share-link av-social-link-whatsapp' ><a target="_blank" aria-label="Share on WhatsApp" href='https://api.whatsapp.com/send?text=https://www.physicsforums.com/insights/think-know-richard-feynman/' aria-hidden='false' data-av_icon='' data-av_iconfont='entypo-fontello' title='' data-avia-related-tooltip='Share on WhatsApp' rel="noopener"><span class='avia_hidden_link_text'>Share on WhatsApp</span></a></li><li class='av-share-link av-social-link-linkedin' ><a target="_blank" aria-label="Share on LinkedIn" href='https://linkedin.com/shareArticle?mini=true&title=Richard%20Feynman%20Quiz%3A%20Think%20You%20Know%20Richard%20Feynman%3F&url=https://www.physicsforums.com/insights/think-know-richard-feynman/' aria-hidden='false' data-av_icon='' data-av_iconfont='entypo-fontello' title='' data-avia-related-tooltip='Share on LinkedIn' rel="noopener"><span class='avia_hidden_link_text'>Share on LinkedIn</span></a></li><li class='av-share-link av-social-link-reddit' ><a target="_blank" aria-label="Share on Reddit" href='https://reddit.com/submit?url=https://www.physicsforums.com/insights/think-know-richard-feynman/&title=Richard%20Feynman%20Quiz%3A%20Think%20You%20Know%20Richard%20Feynman%3F' aria-hidden='false' data-av_icon='' data-av_iconfont='entypo-fontello' title='' data-avia-related-tooltip='Share on Reddit' rel="noopener"><span class='avia_hidden_link_text'>Share on Reddit</span></a></li><li class='av-share-link av-social-link-mail' ><a aria-label="Share by Mail" href='mailto:?subject=Richard%20Feynman%20Quiz%3A%20Think%20You%20Know%20Richard%20Feynman%3F&body=https://www.physicsforums.com/insights/think-know-richard-feynman/' aria-hidden='false' data-av_icon='' data-av_iconfont='entypo-fontello' title='' data-avia-related-tooltip='Share by Mail'><span class='avia_hidden_link_text'>Share by Mail</span></a></li></ul></div></div></footer><div class='post_delimiter'></div></div><div class="post_author_timeline"></div><span class='hidden'> <span class='av-structured-data' itemprop="image" itemscope="itemscope" itemtype="https://schema.org/ImageObject" > <span itemprop='url'>https://www.physicsforums.com/insights/wp-content/uploads/2015/05/feynman_quiz.png</span> <span itemprop='height'>135</span> <span itemprop='width'>240</span> </span> <span class='av-structured-data' itemprop="publisher" itemtype="https://schema.org/Organization" itemscope="itemscope" > <span itemprop='name'>Greg Bernhardt</span> <span itemprop='logo' itemscope itemtype='https://schema.org/ImageObject'> <span itemprop='url'>https://www.physicsforums.com/insights/wp-content/uploads/2019/02/Physics_Forums_Insights_logo.png</span> </span> </span><span class='av-structured-data' itemprop="author" itemscope="itemscope" itemtype="https://schema.org/Person" ><span itemprop='name'>Greg Bernhardt</span></span><span class='av-structured-data' itemprop="datePublished" datetime="2015-05-05T18:40:09-05:00" >2015-05-05 18:40:09</span><span class='av-structured-data' itemprop="dateModified" itemtype="https://schema.org/dateModified" >2024-09-02 09:16:29</span><span class='av-structured-data' itemprop="mainEntityOfPage" itemtype="https://schema.org/mainEntityOfPage" ><span itemprop='name'>Richard Feynman Quiz: Think You Know Richard Feynman?</span></span></span></article><div class='single-big'></div><div class='related_posts clearfix av-related-style-full'><h5 class="related_title">You might also like</h5><div class="related_entries_container"><div class='av_one_half no_margin alpha relThumb relThumb1 relThumbOdd post-format-standard related_column'><a href='https://www.physicsforums.com/insights/interview-physics-mentor-stevendaryl/' class='relThumWrap noLightbox' title='Interview with Physics Mentor: Stevendaryl'><span class='related_image_wrap' ><img data-lazyloaded="1" src="data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIxODAiIGhlaWdodD0iMTM1IiB2aWV3Qm94PSIwIDAgMTgwIDEzNSI+PHJlY3Qgd2lkdGg9IjEwMCUiIGhlaWdodD0iMTAwJSIgZmlsbD0iI2NmZDRkYiIvPjwvc3ZnPg==" loading="lazy" width="180" height="135" data-src="https://www.physicsforums.com/insights/wp-content/uploads/2017/01/steven-180x135.png" class="wp-image-12070 avia-img-lazy-loading-12070 attachment-square size-square wp-post-image" alt="steven" title="steven" decoding="async" /><noscript><img loading="lazy" width="180" height="135" src="https://www.physicsforums.com/insights/wp-content/uploads/2017/01/steven-180x135.png" class="wp-image-12070 avia-img-lazy-loading-12070 attachment-square size-square wp-post-image" alt="steven" title="steven" decoding="async" /></noscript><span class='related-format-icon '><span class='related-format-icon-inner' aria-hidden='true' data-av_icon='' data-av_iconfont='entypo-fontello'></span></span></span><strong class="av-related-title">Interview with Physics Mentor: Stevendaryl</strong></a></div><div class='av_one_half no_margin relThumb relThumb2 relThumbEven post-format-standard related_column'><a href='https://www.physicsforums.com/insights/qa-universe-todays-fraser-cain/' class='relThumWrap noLightbox' title='Q&A With Universe Today’s Astronomer Fraser Cain'><span class='related_image_wrap' ><img data-lazyloaded="1" src="data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIxODAiIGhlaWdodD0iMTM1IiB2aWV3Qm94PSIwIDAgMTgwIDEzNSI+PHJlY3Qgd2lkdGg9IjEwMCUiIGhlaWdodD0iMTAwJSIgZmlsbD0iI2NmZDRkYiIvPjwvc3ZnPg==" loading="lazy" width="180" height="135" data-src="https://www.physicsforums.com/insights/wp-content/uploads/2017/04/frasercain2-180x135.png" class="wp-image-13671 avia-img-lazy-loading-13671 attachment-square size-square wp-post-image" alt="frasercain2" title="frasercain2" decoding="async" /><noscript><img loading="lazy" width="180" height="135" src="https://www.physicsforums.com/insights/wp-content/uploads/2017/04/frasercain2-180x135.png" class="wp-image-13671 avia-img-lazy-loading-13671 attachment-square size-square wp-post-image" alt="frasercain2" title="frasercain2" decoding="async" /></noscript><span class='related-format-icon '><span class='related-format-icon-inner' aria-hidden='true' data-av_icon='' data-av_iconfont='entypo-fontello'></span></span></span><strong class="av-related-title">Q&A With Universe Today’s Astronomer Fraser Cain</strong></a></div><div class='av_one_half no_margin relThumb relThumb3 relThumbOdd post-format-standard related_column'><a href='https://www.physicsforums.com/insights/the-issac-newton-quiz/' class='relThumWrap noLightbox' title='Isaac Newton Quiz: Test Yourself on Isaac Newton'><span class='related_image_wrap' ><img data-lazyloaded="1" src="data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIxODAiIGhlaWdodD0iMTM1IiB2aWV3Qm94PSIwIDAgMTgwIDEzNSI+PHJlY3Qgd2lkdGg9IjEwMCUiIGhlaWdodD0iMTAwJSIgZmlsbD0iI2NmZDRkYiIvPjwvc3ZnPg==" loading="lazy" width="180" height="135" data-src="https://www.physicsforums.com/insights/wp-content/uploads/2015/07/newton-180x135.png" class="wp-image-4213 avia-img-lazy-loading-4213 attachment-square size-square wp-post-image" alt="issac newton" title="newton" decoding="async" /><noscript><img loading="lazy" width="180" height="135" src="https://www.physicsforums.com/insights/wp-content/uploads/2015/07/newton-180x135.png" class="wp-image-4213 avia-img-lazy-loading-4213 attachment-square size-square wp-post-image" alt="issac newton" title="newton" decoding="async" /></noscript><span class='related-format-icon '><span class='related-format-icon-inner' aria-hidden='true' data-av_icon='' data-av_iconfont='entypo-fontello'></span></span></span><strong class="av-related-title">Isaac Newton Quiz: Test Yourself on Isaac Newton</strong></a></div><div class='av_one_half no_margin relThumb relThumb4 relThumbEven post-format-standard related_column'><a href='https://www.physicsforums.com/insights/interview-with-physicist-dale/' class='relThumWrap noLightbox' title='Interview with Physicist Dale'><span class='related_image_wrap' ><img data-lazyloaded="1" src="data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIxODAiIGhlaWdodD0iMTM1IiB2aWV3Qm94PSIwIDAgMTgwIDEzNSI+PHJlY3Qgd2lkdGg9IjEwMCUiIGhlaWdodD0iMTAwJSIgZmlsbD0iI2NmZDRkYiIvPjwvc3ZnPg==" loading="lazy" width="180" height="135" data-src="https://www.physicsforums.com/insights/wp-content/uploads/2018/09/dale-180x135.png" class="wp-image-22386 avia-img-lazy-loading-22386 attachment-square size-square wp-post-image" alt="dale physics" title="dale" decoding="async" /><noscript><img loading="lazy" width="180" height="135" src="https://www.physicsforums.com/insights/wp-content/uploads/2018/09/dale-180x135.png" class="wp-image-22386 avia-img-lazy-loading-22386 attachment-square size-square wp-post-image" alt="dale physics" title="dale" decoding="async" /></noscript><span class='related-format-icon '><span class='related-format-icon-inner' aria-hidden='true' data-av_icon='' data-av_iconfont='entypo-fontello'></span></span></span><strong class="av-related-title">Interview with Physicist Dale</strong></a></div><div class='av_one_half no_margin relThumb relThumb5 relThumbOdd post-format-standard related_column'><a href='https://www.physicsforums.com/insights/all-about-ice-trivia/' class='relThumWrap noLightbox' title='Ice Quiz: All About Ice Trivia'><span class='related_image_wrap' ><img data-lazyloaded="1" src="data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIxODAiIGhlaWdodD0iMTM1IiB2aWV3Qm94PSIwIDAgMTgwIDEzNSI+PHJlY3Qgd2lkdGg9IjEwMCUiIGhlaWdodD0iMTAwJSIgZmlsbD0iI2NmZDRkYiIvPjwvc3ZnPg==" loading="lazy" width="180" height="135" data-src="https://www.physicsforums.com/insights/wp-content/uploads/2015/12/icequiz-180x135.png" class="wp-image-7279 avia-img-lazy-loading-7279 attachment-square size-square wp-post-image" alt="icequiz" title="icequiz" decoding="async" /><noscript><img loading="lazy" width="180" height="135" src="https://www.physicsforums.com/insights/wp-content/uploads/2015/12/icequiz-180x135.png" class="wp-image-7279 avia-img-lazy-loading-7279 attachment-square size-square wp-post-image" alt="icequiz" title="icequiz" decoding="async" /></noscript><span class='related-format-icon '><span class='related-format-icon-inner' aria-hidden='true' data-av_icon='' data-av_iconfont='entypo-fontello'></span></span></span><strong class="av-related-title">Ice Quiz: All About Ice Trivia</strong></a></div><div class='av_one_half no_margin omega relThumb relThumb6 relThumbEven post-format-standard related_column'><a href='https://www.physicsforums.com/insights/interview-with-physicist-george-jones/' class='relThumWrap noLightbox' title='Interview with Physicist George Jones'><span class='related_image_wrap' ><img data-lazyloaded="1" src="data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIxODAiIGhlaWdodD0iMTM1IiB2aWV3Qm94PSIwIDAgMTgwIDEzNSI+PHJlY3Qgd2lkdGg9IjEwMCUiIGhlaWdodD0iMTAwJSIgZmlsbD0iI2NmZDRkYiIvPjwvc3ZnPg==" loading="lazy" width="180" height="135" data-src="https://www.physicsforums.com/insights/wp-content/uploads/2018/09/georgejones-180x135.png" class="wp-image-22381 avia-img-lazy-loading-22381 attachment-square size-square wp-post-image" alt="georgejones - physics" title="georgejones" decoding="async" /><noscript><img loading="lazy" width="180" height="135" src="https://www.physicsforums.com/insights/wp-content/uploads/2018/09/georgejones-180x135.png" class="wp-image-22381 avia-img-lazy-loading-22381 attachment-square size-square wp-post-image" alt="georgejones - physics" title="georgejones" decoding="async" /></noscript><span class='related-format-icon '><span class='related-format-icon-inner' aria-hidden='true' data-av_icon='' data-av_iconfont='entypo-fontello'></span></span></span><strong class="av-related-title">Interview with Physicist George Jones</strong></a></div></div></div><div class='comment-entry post-entry'><div class='comment_meta_container'><div class='side-container-comment'><div class='side-container-comment-inner'> <span class='comment-count'>74</span> <span class='comment-text'>replies</span> <span class='center-border center-border-left'></span> <span class='center-border center-border-right'></span></div></div></div><div class='comment_container'><ol class="commentlist" id="comments"><li class="comment byuser comment-author-hornbein even thread-even depth-1" id="li-comment-12599"><div id="comment-12599"><article><div class="gravatar"></div><div class='comment_content'><header class="comment-header" aria-label="Comment Info" > <cite class="author_name heading"><cite class="comment_author_name">Hornbein</cite></cite> <span class="says">says:</span><div class="comment-meta commentmetadata"> <a href="https://www.physicsforums.com/insights/think-know-richard-feynman/#comment-12599"> <time > July 25, 2021 at 10:24 am </time> </a></div></header><div class='comment_text entry-content-wrapper clearfix' ><p>7 but I actually knew the answers to 6. I got the same score for the scientists where I guessed lucky.</p> <a rel="nofollow" class="comment-reply-login" href="https://www.physicsforums.com/insights/wp-login.php?redirect_to=https%3A%2F%2Fwww.physicsforums.com%2Finsights%2Fthink-know-richard-feynman%2F">Log in to Reply</a></div></div></article></div></li><li class="comment odd alt thread-odd thread-alt depth-1" id="li-comment-9130"><div id="comment-9130"><article><div class="gravatar"></div><div class='comment_content'><header class="comment-header" aria-label="Comment Info" > <cite class="author_name heading"><cite class="comment_author_name">srikanth tupurani</cite></cite> <span class="says">says:</span><div class="comment-meta commentmetadata"> <a href="https://www.physicsforums.com/insights/think-know-richard-feynman/#comment-9130"> <time > March 7, 2018 at 5:28 am </time> </a></div></header><div class='comment_text entry-content-wrapper clearfix' ><p>i got 5. i was not sure about the guide of feynamann. i made a random guess. i got it correct surprising.</p> <a rel="nofollow" class="comment-reply-login" href="https://www.physicsforums.com/insights/wp-login.php?redirect_to=https%3A%2F%2Fwww.physicsforums.com%2Finsights%2Fthink-know-richard-feynman%2F">Log in to Reply</a></div></div></article></div></li><li class="comment byuser comment-author-demystifier even thread-even depth-1" id="li-comment-9108"><div id="comment-9108"><article><div class="gravatar"></div><div class='comment_content'><header class="comment-header" aria-label="Comment Info" > <cite class="author_name heading"><cite class="comment_author_name">Demystifier</cite></cite> <span class="says">says:</span><div class="comment-meta commentmetadata"> <a href="https://www.physicsforums.com/insights/think-know-richard-feynman/#comment-9108"> <time > February 13, 2018 at 4:01 pm </time> </a></div></header><div class='comment_text entry-content-wrapper clearfix' ><p>Only 6/12.</p> <a rel="nofollow" class="comment-reply-login" href="https://www.physicsforums.com/insights/wp-login.php?redirect_to=https%3A%2F%2Fwww.physicsforums.com%2Finsights%2Fthink-know-richard-feynman%2F">Log in to Reply</a></div></div></article></div></li><li class="comment odd alt thread-odd thread-alt depth-1" id="li-comment-4137"><div id="comment-4137"><article><div class="gravatar"></div><div class='comment_content'><header class="comment-header" aria-label="Comment Info" > <cite class="author_name heading"><cite class="comment_author_name">Aniruddha@94</cite></cite> <span class="says">says:</span><div class="comment-meta commentmetadata"> <a href="https://www.physicsforums.com/insights/think-know-richard-feynman/#comment-4137"> <time > May 19, 2016 at 6:46 pm </time> </a></div></header><div class='comment_text entry-content-wrapper clearfix' ><p>“I got 4 and failed:smile:.<br /> By the way I don’t know about him as he is not talked about in high school as Einstein is talked about.<br /> Just took the quiz for seeing my luck.<br /> 2 answers I knew, other were guesses.</p><p>There is error in question 5 of “what condition he had”<br /> It’s showing the wrong answer that I have chosen but not the correct one.”<br /> “Post your scores :)”<br /> 11 out of 12 :)</p> <a rel="nofollow" class="comment-reply-login" href="https://www.physicsforums.com/insights/wp-login.php?redirect_to=https%3A%2F%2Fwww.physicsforums.com%2Finsights%2Fthink-know-richard-feynman%2F">Log in to Reply</a></div></div></article></div></li><li class="comment even thread-even depth-1" id="li-comment-4136"><div id="comment-4136"><article><div class="gravatar"></div><div class='comment_content'><header class="comment-header" aria-label="Comment Info" > <cite class="author_name heading"><cite class="comment_author_name">WhatIsGravity</cite></cite> <span class="says">says:</span><div class="comment-meta commentmetadata"> <a href="https://www.physicsforums.com/insights/think-know-richard-feynman/#comment-4136"> <time > May 19, 2016 at 6:46 pm </time> </a></div></header><div class='comment_text entry-content-wrapper clearfix' ><p>8</p> <a rel="nofollow" class="comment-reply-login" href="https://www.physicsforums.com/insights/wp-login.php?redirect_to=https%3A%2F%2Fwww.physicsforums.com%2Finsights%2Fthink-know-richard-feynman%2F">Log in to Reply</a></div></div></article></div></li><li class="comment byuser comment-author-epenguin odd alt thread-odd thread-alt depth-1" id="li-comment-4135"><div id="comment-4135"><article><div class="gravatar"></div><div class='comment_content'><header class="comment-header" aria-label="Comment Info" > <cite class="author_name heading"><cite class="comment_author_name">epenguin</cite></cite> <span class="says">says:</span><div class="comment-meta commentmetadata"> <a href="https://www.physicsforums.com/insights/think-know-richard-feynman/#comment-4135"> <time > May 19, 2016 at 6:46 pm </time> </a></div></header><div class='comment_text entry-content-wrapper clearfix' ><p>‘Satisfactory’ 6/12 despite having read two biogs and an autobiography, his essays, QED and parts of Lectures.<br /> But some of those fails don’t worry me. Too bad sister didn’t leave vivid impression on me. Those numbers were just a guess. What’s syneasthesia? Why did he need a van?</p> <a rel="nofollow" class="comment-reply-login" href="https://www.physicsforums.com/insights/wp-login.php?redirect_to=https%3A%2F%2Fwww.physicsforums.com%2Finsights%2Fthink-know-richard-feynman%2F">Log in to Reply</a></div></div></article></div></li><li class="comment even thread-even depth-1" id="li-comment-4134"><div id="comment-4134"><article><div class="gravatar"></div><div class='comment_content'><header class="comment-header" aria-label="Comment Info" > <cite class="author_name heading"><cite class="comment_author_name">Strum</cite></cite> <span class="says">says:</span><div class="comment-meta commentmetadata"> <a href="https://www.physicsforums.com/insights/think-know-richard-feynman/#comment-4134"> <time > May 19, 2016 at 6:46 pm </time> </a></div></header><div class='comment_text entry-content-wrapper clearfix' ><p>scored 3 :(</p> <a rel="nofollow" class="comment-reply-login" href="https://www.physicsforums.com/insights/wp-login.php?redirect_to=https%3A%2F%2Fwww.physicsforums.com%2Finsights%2Fthink-know-richard-feynman%2F">Log in to Reply</a></div></div></article></div></li><li class="comment odd alt thread-odd thread-alt depth-1" id="li-comment-4133"><div id="comment-4133"><article><div class="gravatar"></div><div class='comment_content'><header class="comment-header" aria-label="Comment Info" > <cite class="author_name heading"><cite class="comment_author_name">zoobyshoe</cite></cite> <span class="says">says:</span><div class="comment-meta commentmetadata"> <a href="https://www.physicsforums.com/insights/think-know-richard-feynman/#comment-4133"> <time > May 19, 2016 at 6:46 pm </time> </a></div></header><div class='comment_text entry-content-wrapper clearfix' ><p>“Feynam said that he saw equations flying around in all sorts of colors.”<br /> I need chapter and verse from Feynman’s mouth. I want to know the context.</p> <a rel="nofollow" class="comment-reply-login" href="https://www.physicsforums.com/insights/wp-login.php?redirect_to=https%3A%2F%2Fwww.physicsforums.com%2Finsights%2Fthink-know-richard-feynman%2F">Log in to Reply</a></div></div></article></div></li><li class="comment byuser comment-author-hornbein even thread-even depth-1" id="li-comment-4132"><div id="comment-4132"><article><div class="gravatar"></div><div class='comment_content'><header class="comment-header" aria-label="Comment Info" > <cite class="author_name heading"><cite class="comment_author_name">Hornbein</cite></cite> <span class="says">says:</span><div class="comment-meta commentmetadata"> <a href="https://www.physicsforums.com/insights/think-know-richard-feynman/#comment-4132"> <time > May 19, 2016 at 6:46 pm </time> </a></div></header><div class='comment_text entry-content-wrapper clearfix' ><p>“10/12</p><p>#2 needs to be changed to “drawing”. And I’ll need a citation for #5. I know that Richard Cytowic thinks Feynman had synesthesia, but I don’t believe Feynman, himself, made any such claim.”</p><p>Feynam said that he saw equations flying around in all sorts of colors.</p><p>I got 8, having read the books about ten years ago.</p> <a rel="nofollow" class="comment-reply-login" href="https://www.physicsforums.com/insights/wp-login.php?redirect_to=https%3A%2F%2Fwww.physicsforums.com%2Finsights%2Fthink-know-richard-feynman%2F">Log in to Reply</a></div></div></article></div></li><li class="comment odd alt thread-odd thread-alt depth-1" id="li-comment-4131"><div id="comment-4131"><article><div class="gravatar"></div><div class='comment_content'><header class="comment-header" aria-label="Comment Info" > <cite class="author_name heading"><cite class="comment_author_name">BWV</cite></cite> <span class="says">says:</span><div class="comment-meta commentmetadata"> <a href="https://www.physicsforums.com/insights/think-know-richard-feynman/#comment-4131"> <time > May 19, 2016 at 6:46 pm </time> </a></div></header><div class='comment_text entry-content-wrapper clearfix' ><p>10/12</p><p>Just finished the audiobook of the Lawrence Krauss bio. Krauss uses the 1/200 number for Challenger</p> <a rel="nofollow" class="comment-reply-login" href="https://www.physicsforums.com/insights/wp-login.php?redirect_to=https%3A%2F%2Fwww.physicsforums.com%2Finsights%2Fthink-know-richard-feynman%2F">Log in to Reply</a></div></div></article></div></li><li class="comment even thread-even depth-1" id="li-comment-4130"><div id="comment-4130"><article><div class="gravatar"></div><div class='comment_content'><header class="comment-header" aria-label="Comment Info" > <cite class="author_name heading"><cite class="comment_author_name">tommyxu3</cite></cite> <span class="says">says:</span><div class="comment-meta commentmetadata"> <a href="https://www.physicsforums.com/insights/think-know-richard-feynman/#comment-4130"> <time > May 19, 2016 at 6:46 pm </time> </a></div></header><div class='comment_text entry-content-wrapper clearfix' ><p>Got 3 wrong… I don’t know his IQ…</p> <a rel="nofollow" class="comment-reply-login" href="https://www.physicsforums.com/insights/wp-login.php?redirect_to=https%3A%2F%2Fwww.physicsforums.com%2Finsights%2Fthink-know-richard-feynman%2F">Log in to Reply</a></div></div></article></div></li><li class="comment odd alt thread-odd thread-alt depth-1" id="li-comment-4129"><div id="comment-4129"><article><div class="gravatar"></div><div class='comment_content'><header class="comment-header" aria-label="Comment Info" > <cite class="author_name heading"><cite class="comment_author_name">phion</cite></cite> <span class="says">says:</span><div class="comment-meta commentmetadata"> <a href="https://www.physicsforums.com/insights/think-know-richard-feynman/#comment-4129"> <time > May 19, 2016 at 6:46 pm </time> </a></div></header><div class='comment_text entry-content-wrapper clearfix' ><p>I can’t believe my score. I read so many of his books….</p> <a rel="nofollow" class="comment-reply-login" href="https://www.physicsforums.com/insights/wp-login.php?redirect_to=https%3A%2F%2Fwww.physicsforums.com%2Finsights%2Fthink-know-richard-feynman%2F">Log in to Reply</a></div></div></article></div></li><li class="comment byuser comment-author-peterdonis even thread-even depth-1" id="li-comment-4128"><div id="comment-4128"><article><div class="gravatar"></div><div class='comment_content'><header class="comment-header" aria-label="Comment Info" > <cite class="author_name heading"><cite class="comment_author_name">PeterDonis</cite></cite> <span class="says">says:</span><div class="comment-meta commentmetadata"> <a href="https://www.physicsforums.com/insights/think-know-richard-feynman/#comment-4128"> <time > May 19, 2016 at 6:46 pm </time> </a></div></header><div class='comment_text entry-content-wrapper clearfix' ><p>“I think I found it on his wiki page”</p><p>Ah, another illustration of how Wikipedia can’t always be trusted. :wink: I see the “1 in 200” figure there, but the only source given is Appendix F to the commission report, which I linked to, and which does not contain that figure anywhere. The only figure I think is justified by that document (which is the correct primary source) is “1 in 100”. The two key quotes from that document are, first, from the opening paragraph:</p><p>“The estimates range from roughly 1 in 100 to 1 in 100,000. The higher figures come from the working engineers, and the very low figures from management.”</p><p>Second, from the conclusion:</p><p>“They [the Shuttles] therefore fly in a relatively unsafe condition, with a chance of failure of the order of a percent (it is difficult to be more accurate).”</p><p>(The Wiki page does mention Feynman’s book, What Do You Care What Other People Think, the second half of which is his telling the story of the Challenger investigation. It’s possible that the “1 in 200” figure is given somewhere in there; I don’t have my copy handy to check. Even if it is, though, I would say the “official” primary source is still the Appendix F document, so I should still get 1 more point of credit for this quiz, which is of course my real agenda here. :wink: )</p> <a rel="nofollow" class="comment-reply-login" href="https://www.physicsforums.com/insights/wp-login.php?redirect_to=https%3A%2F%2Fwww.physicsforums.com%2Finsights%2Fthink-know-richard-feynman%2F">Log in to Reply</a></div></div></article></div></li><li class="comment byuser comment-author-greg-bernhardt bypostauthor odd alt thread-odd thread-alt depth-1" id="li-comment-4127"><div id="comment-4127"><article><div class="gravatar"></div><div class='comment_content'><header class="comment-header" aria-label="Comment Info" > <cite class="author_name heading"><cite class="comment_author_name">Greg Bernhardt</cite></cite> <span class="says">says:</span><div class="comment-meta commentmetadata"> <a href="https://www.physicsforums.com/insights/think-know-richard-feynman/#comment-4127"> <time > May 19, 2016 at 6:46 pm </time> </a></div></header><div class='comment_text entry-content-wrapper clearfix' ><p>“What is the source for that number?”<br /> I think I found it on his wiki page</p> <a rel="nofollow" class="comment-reply-login" href="https://www.physicsforums.com/insights/wp-login.php?redirect_to=https%3A%2F%2Fwww.physicsforums.com%2Finsights%2Fthink-know-richard-feynman%2F">Log in to Reply</a></div></div></article></div></li><li class="comment byuser comment-author-peterdonis even thread-even depth-1" id="li-comment-4126"><div id="comment-4126"><article><div class="gravatar"></div><div class='comment_content'><header class="comment-header" aria-label="Comment Info" > <cite class="author_name heading"><cite class="comment_author_name">PeterDonis</cite></cite> <span class="says">says:</span><div class="comment-meta commentmetadata"> <a href="https://www.physicsforums.com/insights/think-know-richard-feynman/#comment-4126"> <time > May 19, 2016 at 6:46 pm </time> </a></div></header><div class='comment_text entry-content-wrapper clearfix' ><p>8/12, would have been 10/12 if I had trusted my first instinct on two questions (Brazil and Professor).</p><p>Also I’m not sure about question 10. I answered 1 in 100, while the “correct” answer is given as 1 in 200. What is the source for that number? In his famous [URL=’http://science.ksc.nasa.gov/shuttle/missions/51-l/docs/rogers-commission/Appendix-F.txt’]Appendix F[/URL] to the commission report (famous enough for me to have borrowed its last sentence for my sig, anyway :wink: ), the final estimate is given as “on the order of a percent” (i.e., 1 in 100). The number 1 in 200 doesn’t appear anywhere.</p> <a rel="nofollow" class="comment-reply-login" href="https://www.physicsforums.com/insights/wp-login.php?redirect_to=https%3A%2F%2Fwww.physicsforums.com%2Finsights%2Fthink-know-richard-feynman%2F">Log in to Reply</a></div></div></article></div></li><li class="comment odd alt thread-odd thread-alt depth-1" id="li-comment-4125"><div id="comment-4125"><article><div class="gravatar"></div><div class='comment_content'><header class="comment-header" aria-label="Comment Info" > <cite class="author_name heading"><cite class="comment_author_name">DiracPool</cite></cite> <span class="says">says:</span><div class="comment-meta commentmetadata"> <a href="https://www.physicsforums.com/insights/think-know-richard-feynman/#comment-4125"> <time > May 19, 2016 at 6:46 pm </time> </a></div></header><div class='comment_text entry-content-wrapper clearfix' ><p>8/12. I never knew he had synethesia. You think that would have been mentioned somewhere in his bios.</p> <a rel="nofollow" class="comment-reply-login" href="https://www.physicsforums.com/insights/wp-login.php?redirect_to=https%3A%2F%2Fwww.physicsforums.com%2Finsights%2Fthink-know-richard-feynman%2F">Log in to Reply</a></div></div></article></div></li><li class="comment even thread-even depth-1" id="li-comment-4124"><div id="comment-4124"><article><div class="gravatar"></div><div class='comment_content'><header class="comment-header" aria-label="Comment Info" > <cite class="author_name heading"><cite class="comment_author_name">phion</cite></cite> <span class="says">says:</span><div class="comment-meta commentmetadata"> <a href="https://www.physicsforums.com/insights/think-know-richard-feynman/#comment-4124"> <time > May 19, 2016 at 6:46 pm </time> </a></div></header><div class='comment_text entry-content-wrapper clearfix' ><p>I’ve read/listened/watched almost all there is regarding Feynman, and I scored a 7.</p> <a rel="nofollow" class="comment-reply-login" href="https://www.physicsforums.com/insights/wp-login.php?redirect_to=https%3A%2F%2Fwww.physicsforums.com%2Finsights%2Fthink-know-richard-feynman%2F">Log in to Reply</a></div></div></article></div></li><li class="comment odd alt thread-odd thread-alt depth-1" id="li-comment-4123"><div id="comment-4123"><article><div class="gravatar"></div><div class='comment_content'><header class="comment-header" aria-label="Comment Info" > <cite class="author_name heading"><cite class="comment_author_name">Nugso</cite></cite> <span class="says">says:</span><div class="comment-meta commentmetadata"> <a href="https://www.physicsforums.com/insights/think-know-richard-feynman/#comment-4123"> <time > May 19, 2016 at 6:46 pm </time> </a></div></header><div class='comment_text entry-content-wrapper clearfix' ><p>Congratulations – you have completed Richard Feynman Quiz.</p><p>You scored 11 points out of 12 points total.</p><p>Your performance has been rated as Excellent.</p><p>Ah, didn’t know he taught at Cornell.</p> <a rel="nofollow" class="comment-reply-login" href="https://www.physicsforums.com/insights/wp-login.php?redirect_to=https%3A%2F%2Fwww.physicsforums.com%2Finsights%2Fthink-know-richard-feynman%2F">Log in to Reply</a></div></div></article></div></li><li class="comment even thread-even depth-1" id="li-comment-4122"><div id="comment-4122"><article><div class="gravatar"></div><div class='comment_content'><header class="comment-header" aria-label="Comment Info" > <cite class="author_name heading"><cite class="comment_author_name">Muti</cite></cite> <span class="says">says:</span><div class="comment-meta commentmetadata"> <a href="https://www.physicsforums.com/insights/think-know-richard-feynman/#comment-4122"> <time > May 19, 2016 at 6:46 pm </time> </a></div></header><div class='comment_text entry-content-wrapper clearfix' ><p>Some brilliant peoples here…. judging by score they are getting :nb):nb)</p> <a rel="nofollow" class="comment-reply-login" href="https://www.physicsforums.com/insights/wp-login.php?redirect_to=https%3A%2F%2Fwww.physicsforums.com%2Finsights%2Fthink-know-richard-feynman%2F">Log in to Reply</a></div></div></article></div></li><li class="comment odd alt thread-odd thread-alt depth-1" id="li-comment-4121"><div id="comment-4121"><article><div class="gravatar"></div><div class='comment_content'><header class="comment-header" aria-label="Comment Info" > <cite class="author_name heading"><cite class="comment_author_name">Lisa!</cite></cite> <span class="says">says:</span><div class="comment-meta commentmetadata"> <a href="https://www.physicsforums.com/insights/think-know-richard-feynman/#comment-4121"> <time > May 19, 2016 at 6:46 pm </time> </a></div></header><div class='comment_text entry-content-wrapper clearfix' ><p>5…:oldtongue:</p> <a rel="nofollow" class="comment-reply-login" href="https://www.physicsforums.com/insights/wp-login.php?redirect_to=https%3A%2F%2Fwww.physicsforums.com%2Finsights%2Fthink-know-richard-feynman%2F">Log in to Reply</a></div></div></article></div></li><li class="comment even thread-even depth-1" id="li-comment-4120"><div id="comment-4120"><article><div class="gravatar"></div><div class='comment_content'><header class="comment-header" aria-label="Comment Info" > <cite class="author_name heading"><cite class="comment_author_name">cobalt124</cite></cite> <span class="says">says:</span><div class="comment-meta commentmetadata"> <a href="https://www.physicsforums.com/insights/think-know-richard-feynman/#comment-4120"> <time > May 19, 2016 at 6:46 pm </time> </a></div></header><div class='comment_text entry-content-wrapper clearfix' ><p>9/12.</p> <a rel="nofollow" class="comment-reply-login" href="https://www.physicsforums.com/insights/wp-login.php?redirect_to=https%3A%2F%2Fwww.physicsforums.com%2Finsights%2Fthink-know-richard-feynman%2F">Log in to Reply</a></div></div></article></div></li><li class="comment byuser comment-author-e-bar-goum odd alt thread-odd thread-alt depth-1" id="li-comment-4119"><div id="comment-4119"><article><div class="gravatar"></div><div class='comment_content'><header class="comment-header" aria-label="Comment Info" > <cite class="author_name heading"><cite class="comment_author_name">e.bar.goum</cite></cite> <span class="says">says:</span><div class="comment-meta commentmetadata"> <a href="https://www.physicsforums.com/insights/think-know-richard-feynman/#comment-4119"> <time > May 19, 2016 at 6:46 pm </time> </a></div></header><div class='comment_text entry-content-wrapper clearfix' ><p>11/12! I missed the one about the odds of catastrophic failure in the Challenger investigation. Clearly, there’s some stuff stuck in the dim corners of my memory.</p><p>(ETA: And it’s not like he’s a hero of mine either. So I don’t even know where that stuff came from.)</p> <a rel="nofollow" class="comment-reply-login" href="https://www.physicsforums.com/insights/wp-login.php?redirect_to=https%3A%2F%2Fwww.physicsforums.com%2Finsights%2Fthink-know-richard-feynman%2F">Log in to Reply</a></div></div></article></div></li><li class="comment byuser comment-author-dr-transport even thread-even depth-1" id="li-comment-4118"><div id="comment-4118"><article><div class="gravatar"></div><div class='comment_content'><header class="comment-header" aria-label="Comment Info" > <cite class="author_name heading"><cite class="comment_author_name">Dr Transport</cite></cite> <span class="says">says:</span><div class="comment-meta commentmetadata"> <a href="https://www.physicsforums.com/insights/think-know-richard-feynman/#comment-4118"> <time > May 19, 2016 at 6:46 pm </time> </a></div></header><div class='comment_text entry-content-wrapper clearfix' ><p>9….. and he is still my favorite physicist of all time.</p> <a rel="nofollow" class="comment-reply-login" href="https://www.physicsforums.com/insights/wp-login.php?redirect_to=https%3A%2F%2Fwww.physicsforums.com%2Finsights%2Fthink-know-richard-feynman%2F">Log in to Reply</a></div></div></article></div></li><li class="comment byuser comment-author-aleazk odd alt thread-odd thread-alt depth-1" id="li-comment-4117"><div id="comment-4117"><article><div class="gravatar"></div><div class='comment_content'><header class="comment-header" aria-label="Comment Info" > <cite class="author_name heading"><cite class="comment_author_name">aleazk</cite></cite> <span class="says">says:</span><div class="comment-meta commentmetadata"> <a href="https://www.physicsforums.com/insights/think-know-richard-feynman/#comment-4117"> <time > May 19, 2016 at 6:46 pm </time> </a></div></header><div class='comment_text entry-content-wrapper clearfix' ><p>8/10, no guesses. I read SYAJMF some years ago.</p> <a rel="nofollow" class="comment-reply-login" href="https://www.physicsforums.com/insights/wp-login.php?redirect_to=https%3A%2F%2Fwww.physicsforums.com%2Finsights%2Fthink-know-richard-feynman%2F">Log in to Reply</a></div></div></article></div></li><li class="comment byuser comment-author-statguy2000 even thread-even depth-1" id="li-comment-4116"><div id="comment-4116"><article><div class="gravatar"></div><div class='comment_content'><header class="comment-header" aria-label="Comment Info" > <cite class="author_name heading"><cite class="comment_author_name">StatGuy2000</cite></cite> <span class="says">says:</span><div class="comment-meta commentmetadata"> <a href="https://www.physicsforums.com/insights/think-know-richard-feynman/#comment-4116"> <time > May 19, 2016 at 6:46 pm </time> </a></div></header><div class='comment_text entry-content-wrapper clearfix' ><p>10 out of 12 for this test — I got the question about his favourite place to travel wrong which I should have answered right (Mexico, instead of Brazil). Ouch! :eek:</p> <a rel="nofollow" class="comment-reply-login" href="https://www.physicsforums.com/insights/wp-login.php?redirect_to=https%3A%2F%2Fwww.physicsforums.com%2Finsights%2Fthink-know-richard-feynman%2F">Log in to Reply</a></div></div></article></div></li><li class="comment byuser comment-author-ibix odd alt thread-odd thread-alt depth-1" id="li-comment-4115"><div id="comment-4115"><article><div class="gravatar"></div><div class='comment_content'><header class="comment-header" aria-label="Comment Info" > <cite class="author_name heading"><cite class="comment_author_name">Ibix</cite></cite> <span class="says">says:</span><div class="comment-meta commentmetadata"> <a href="https://www.physicsforums.com/insights/think-know-richard-feynman/#comment-4115"> <time > May 19, 2016 at 6:46 pm </time> </a></div></header><div class='comment_text entry-content-wrapper clearfix' ><p>8, including a couple of guesses.</p> <a rel="nofollow" class="comment-reply-login" href="https://www.physicsforums.com/insights/wp-login.php?redirect_to=https%3A%2F%2Fwww.physicsforums.com%2Finsights%2Fthink-know-richard-feynman%2F">Log in to Reply</a></div></div></article></div></li><li class="comment even thread-even depth-1" id="li-comment-4114"><div id="comment-4114"><article><div class="gravatar"></div><div class='comment_content'><header class="comment-header" aria-label="Comment Info" > <cite class="author_name heading"><cite class="comment_author_name">Muti</cite></cite> <span class="says">says:</span><div class="comment-meta commentmetadata"> <a href="https://www.physicsforums.com/insights/think-know-richard-feynman/#comment-4114"> <time > May 19, 2016 at 6:46 pm </time> </a></div></header><div class='comment_text entry-content-wrapper clearfix' ><p>2/12…. Seems I heard about him first time. One Confession: I forgot quantum mechanics long ago:biggrin:</p> <a rel="nofollow" class="comment-reply-login" href="https://www.physicsforums.com/insights/wp-login.php?redirect_to=https%3A%2F%2Fwww.physicsforums.com%2Finsights%2Fthink-know-richard-feynman%2F">Log in to Reply</a></div></div></article></div></li><li class="comment byuser comment-author-greg-bernhardt bypostauthor odd alt thread-odd thread-alt depth-1" id="li-comment-4113"><div id="comment-4113"><article><div class="gravatar"></div><div class='comment_content'><header class="comment-header" aria-label="Comment Info" > <cite class="author_name heading"><cite class="comment_author_name">Greg Bernhardt</cite></cite> <span class="says">says:</span><div class="comment-meta commentmetadata"> <a href="https://www.physicsforums.com/insights/think-know-richard-feynman/#comment-4113"> <time > May 19, 2016 at 6:46 pm </time> </a></div></header><div class='comment_text entry-content-wrapper clearfix' ><p>“8.</p><p>I read his autobiographies a long time ago, so I knew a few things, e.g that he was a painter. But the questions were very difficult. It’s not that easy to know the exact year he won the Nobel (I actually guessed that one right), or that probability that he estimated. It would probably have been better to ask what he got the price for, or who he shared it with, and to ask what investigation he was involved in.”<br /> Too easy :)</p> <a rel="nofollow" class="comment-reply-login" href="https://www.physicsforums.com/insights/wp-login.php?redirect_to=https%3A%2F%2Fwww.physicsforums.com%2Finsights%2Fthink-know-richard-feynman%2F">Log in to Reply</a></div></div></article></div></li><li class="comment even thread-even depth-1" id="li-comment-4112"><div id="comment-4112"><article><div class="gravatar"></div><div class='comment_content'><header class="comment-header" aria-label="Comment Info" > <cite class="author_name heading"><cite class="comment_author_name">zoobyshoe</cite></cite> <span class="says">says:</span><div class="comment-meta commentmetadata"> <a href="https://www.physicsforums.com/insights/think-know-richard-feynman/#comment-4112"> <time > May 19, 2016 at 6:46 pm </time> </a></div></header><div class='comment_text entry-content-wrapper clearfix' ><p>10/12</p><p>#2 needs to be changed to “drawing”. And I’ll need a citation for #5. I know that Richard Cytowic thinks Feynman had synesthesia, but I don’t believe Feynman, himself, made any such claim.</p> <a rel="nofollow" class="comment-reply-login" href="https://www.physicsforums.com/insights/wp-login.php?redirect_to=https%3A%2F%2Fwww.physicsforums.com%2Finsights%2Fthink-know-richard-feynman%2F">Log in to Reply</a></div></div></article></div></li><li class="comment odd alt thread-odd thread-alt depth-1" id="li-comment-4111"><div id="comment-4111"><article><div class="gravatar"></div><div class='comment_content'><header class="comment-header" aria-label="Comment Info" > <cite class="author_name heading"><cite class="comment_author_name">mheslep</cite></cite> <span class="says">says:</span><div class="comment-meta commentmetadata"> <a href="https://www.physicsforums.com/insights/think-know-richard-feynman/#comment-4111"> <time > May 19, 2016 at 6:46 pm </time> </a></div></header><div class='comment_text entry-content-wrapper clearfix' ><p>8/12</p><p>I’ve read Gleick’s Genius and Surely You Must Be Joking …</p><p>These covered family (Joan), Wheeler, Manhattan and locks, Cornell, Brazil, painting, FD’s on the van. Couldn’t quite recalll IQ, off by 5. Knew Challenger failure odds were low, but thought 1:100. Never read about the synaesthesia, and couldn’t be bothered to look up the exact year for QED.</p> <a rel="nofollow" class="comment-reply-login" href="https://www.physicsforums.com/insights/wp-login.php?redirect_to=https%3A%2F%2Fwww.physicsforums.com%2Finsights%2Fthink-know-richard-feynman%2F">Log in to Reply</a></div></div></article></div></li><li class="comment byuser comment-author-dennisn even thread-even depth-1" id="li-comment-4110"><div id="comment-4110"><article><div class="gravatar"></div><div class='comment_content'><header class="comment-header" aria-label="Comment Info" > <cite class="author_name heading"><cite class="comment_author_name">DennisN</cite></cite> <span class="says">says:</span><div class="comment-meta commentmetadata"> <a href="https://www.physicsforums.com/insights/think-know-richard-feynman/#comment-4110"> <time > May 19, 2016 at 6:46 pm </time> </a></div></header><div class='comment_text entry-content-wrapper clearfix' ><p>5/12 – the only thing I was fairly sure of was his doctoral advisor.</p> <a rel="nofollow" class="comment-reply-login" href="https://www.physicsforums.com/insights/wp-login.php?redirect_to=https%3A%2F%2Fwww.physicsforums.com%2Finsights%2Fthink-know-richard-feynman%2F">Log in to Reply</a></div></div></article></div></li><li class="comment byuser comment-author-greg-bernhardt bypostauthor odd alt thread-odd thread-alt depth-1" id="li-comment-4109"><div id="comment-4109"><article><div class="gravatar"></div><div class='comment_content'><header class="comment-header" aria-label="Comment Info" > <cite class="author_name heading"><cite class="comment_author_name">Greg Bernhardt</cite></cite> <span class="says">says:</span><div class="comment-meta commentmetadata"> <a href="https://www.physicsforums.com/insights/think-know-richard-feynman/#comment-4109"> <time > May 19, 2016 at 6:46 pm </time> </a></div></header><div class='comment_text entry-content-wrapper clearfix' ><p>“No option is coming correct for question 5.<br /> I’ve tried the quiz 4 times for seeing the correct answer.”<br /> Fixed, thanks</p> <a rel="nofollow" class="comment-reply-login" href="https://www.physicsforums.com/insights/wp-login.php?redirect_to=https%3A%2F%2Fwww.physicsforums.com%2Finsights%2Fthink-know-richard-feynman%2F">Log in to Reply</a></div></div></article></div></li><li class="comment even thread-even depth-1" id="li-comment-4108"><div id="comment-4108"><article><div class="gravatar"></div><div class='comment_content'><header class="comment-header" aria-label="Comment Info" > <cite class="author_name heading"><cite class="comment_author_name">Raghav Gupta</cite></cite> <span class="says">says:</span><div class="comment-meta commentmetadata"> <a href="https://www.physicsforums.com/insights/think-know-richard-feynman/#comment-4108"> <time > May 19, 2016 at 6:46 pm </time> </a></div></header><div class='comment_text entry-content-wrapper clearfix' ><p>No option is coming correct for question 5.<br /> I’ve tried the quiz 4 times for seeing the correct answer.</p> <a rel="nofollow" class="comment-reply-login" href="https://www.physicsforums.com/insights/wp-login.php?redirect_to=https%3A%2F%2Fwww.physicsforums.com%2Finsights%2Fthink-know-richard-feynman%2F">Log in to Reply</a></div></div></article></div></li><li class="comment odd alt thread-odd thread-alt depth-1" id="li-comment-4107"><div id="comment-4107"><article><div class="gravatar"></div><div class='comment_content'><header class="comment-header" aria-label="Comment Info" > <cite class="author_name heading"><cite class="comment_author_name">Raghav Gupta</cite></cite> <span class="says">says:</span><div class="comment-meta commentmetadata"> <a href="https://www.physicsforums.com/insights/think-know-richard-feynman/#comment-4107"> <time > May 19, 2016 at 6:46 pm </time> </a></div></header><div class='comment_text entry-content-wrapper clearfix' ><p>“He doesn’t quite reach the level of pop sci fame that Einstein does.”<br /> That’s true.</p> <a rel="nofollow" class="comment-reply-login" href="https://www.physicsforums.com/insights/wp-login.php?redirect_to=https%3A%2F%2Fwww.physicsforums.com%2Finsights%2Fthink-know-richard-feynman%2F">Log in to Reply</a></div></div></article></div></li><li class="comment even thread-even depth-1" id="li-comment-4106"><div id="comment-4106"><article><div class="gravatar"></div><div class='comment_content'><header class="comment-header" aria-label="Comment Info" > <cite class="author_name heading"><cite class="comment_author_name">Raghav Gupta</cite></cite> <span class="says">says:</span><div class="comment-meta commentmetadata"> <a href="https://www.physicsforums.com/insights/think-know-richard-feynman/#comment-4106"> <time > May 19, 2016 at 6:46 pm </time> </a></div></header><div class='comment_text entry-content-wrapper clearfix' ><p>“Post your scores :)”<br /> I got 4 and failed:smile:.<br /> By the way I don’t know about him as he is not talked about in high school as Einstein is talked about.<br /> Just took the quiz for seeing my luck.<br /> 2 answers I knew, other were guesses.</p><p>There is error in question 5 of “what condition he had”<br /> It’s showing the wrong answer that I have chosen but not the correct one.</p> <a rel="nofollow" class="comment-reply-login" href="https://www.physicsforums.com/insights/wp-login.php?redirect_to=https%3A%2F%2Fwww.physicsforums.com%2Finsights%2Fthink-know-richard-feynman%2F">Log in to Reply</a></div></div></article></div></li><li class="comment byuser comment-author-greg-bernhardt bypostauthor odd alt thread-odd thread-alt depth-1" id="li-comment-4105"><div id="comment-4105"><article><div class="gravatar"></div><div class='comment_content'><header class="comment-header" aria-label="Comment Info" > <cite class="author_name heading"><cite class="comment_author_name">Greg Bernhardt</cite></cite> <span class="says">says:</span><div class="comment-meta commentmetadata"> <a href="https://www.physicsforums.com/insights/think-know-richard-feynman/#comment-4105"> <time > May 19, 2016 at 6:46 pm </time> </a></div></header><div class='comment_text entry-content-wrapper clearfix' ><p>Post your scores :)</p> <a rel="nofollow" class="comment-reply-login" href="https://www.physicsforums.com/insights/wp-login.php?redirect_to=https%3A%2F%2Fwww.physicsforums.com%2Finsights%2Fthink-know-richard-feynman%2F">Log in to Reply</a></div></div></article></div></li><li class="comment even thread-even depth-1" id="li-comment-1054"><div id="comment-1054"><article><div class="gravatar"></div><div class='comment_content'><header class="comment-header" aria-label="Comment Info" > <cite class="author_name heading"><cite class="comment_author_name">S Buschmann</cite></cite> <span class="says">says:</span><div class="comment-meta commentmetadata"> <a href="https://www.physicsforums.com/insights/think-know-richard-feynman/#comment-1054"> <time > February 22, 2016 at 3:16 am </time> </a></div></header><div class='comment_text entry-content-wrapper clearfix' ><p>5/12. Fun quiz. His daughter published a book of his letters to her.</p> <a rel="nofollow" class="comment-reply-login" href="https://www.physicsforums.com/insights/wp-login.php?redirect_to=https%3A%2F%2Fwww.physicsforums.com%2Finsights%2Fthink-know-richard-feynman%2F">Log in to Reply</a></div></div></article></div></li><li class="comment odd alt thread-odd thread-alt depth-1" id="li-comment-1041"><div id="comment-1041"><article><div class="gravatar"></div><div class='comment_content'><header class="comment-header" aria-label="Comment Info" > <cite class="author_name heading"><cite class="comment_author_name">Isaac0427</cite></cite> <span class="says">says:</span><div class="comment-meta commentmetadata"> <a href="https://www.physicsforums.com/insights/think-know-richard-feynman/#comment-1041"> <time > February 13, 2016 at 1:01 am </time> </a></div></header><div class='comment_text entry-content-wrapper clearfix' ><p>I got a 4, but I didn't think I knew him that well.</p> <a rel="nofollow" class="comment-reply-login" href="https://www.physicsforums.com/insights/wp-login.php?redirect_to=https%3A%2F%2Fwww.physicsforums.com%2Finsights%2Fthink-know-richard-feynman%2F">Log in to Reply</a></div></div></article></div></li><li class="comment even thread-even depth-1" id="li-comment-846"><div id="comment-846"><article><div class="gravatar"></div><div class='comment_content'><header class="comment-header" aria-label="Comment Info" > <cite class="author_name heading"><cite class="comment_author_name">RabbitWho</cite></cite> <span class="says">says:</span><div class="comment-meta commentmetadata"> <a href="https://www.physicsforums.com/insights/think-know-richard-feynman/#comment-846"> <time > November 18, 2015 at 5:04 pm </time> </a></div></header><div class='comment_text entry-content-wrapper clearfix' ><p>7! Woo! I might be below average at physics but at least I'm a "satisfactory" fan-girl. :)</p> <a rel="nofollow" class="comment-reply-login" href="https://www.physicsforums.com/insights/wp-login.php?redirect_to=https%3A%2F%2Fwww.physicsforums.com%2Finsights%2Fthink-know-richard-feynman%2F">Log in to Reply</a></div></div></article></div></li><li class="comment odd alt thread-odd thread-alt depth-1" id="li-comment-764"><div id="comment-764"><article><div class="gravatar"></div><div class='comment_content'><header class="comment-header" aria-label="Comment Info" > <cite class="author_name heading"><cite class="comment_author_name">pabilbado</cite></cite> <span class="says">says:</span><div class="comment-meta commentmetadata"> <a href="https://www.physicsforums.com/insights/think-know-richard-feynman/#comment-764"> <time > September 27, 2015 at 5:30 pm </time> </a></div></header><div class='comment_text entry-content-wrapper clearfix' ><p>10/12</p> <a rel="nofollow" class="comment-reply-login" href="https://www.physicsforums.com/insights/wp-login.php?redirect_to=https%3A%2F%2Fwww.physicsforums.com%2Finsights%2Fthink-know-richard-feynman%2F">Log in to Reply</a></div></div></article></div></li><li class="comment even thread-even depth-1" id="li-comment-430"><div id="comment-430"><article><div class="gravatar"></div><div class='comment_content'><header class="comment-header" aria-label="Comment Info" > <cite class="author_name heading"><cite class="comment_author_name">fireflies</cite></cite> <span class="says">says:</span><div class="comment-meta commentmetadata"> <a href="https://www.physicsforums.com/insights/think-know-richard-feynman/#comment-430"> <time > July 23, 2015 at 2:27 am </time> </a></div></header><div class='comment_text entry-content-wrapper clearfix' ><p>Well, I just know his name. I havent read so much about scientists. So, all the questions I left unanswered. But the comment says I must read about him :)</p> <a rel="nofollow" class="comment-reply-login" href="https://www.physicsforums.com/insights/wp-login.php?redirect_to=https%3A%2F%2Fwww.physicsforums.com%2Finsights%2Fthink-know-richard-feynman%2F">Log in to Reply</a></div></div></article></div></li><li class="comment odd alt thread-odd thread-alt depth-1" id="li-comment-366"><div id="comment-366"><article><div class="gravatar"></div><div class='comment_content'><header class="comment-header" aria-label="Comment Info" > <cite class="author_name heading"><cite class="comment_author_name">Dembadon</cite></cite> <span class="says">says:</span><div class="comment-meta commentmetadata"> <a href="https://www.physicsforums.com/insights/think-know-richard-feynman/#comment-366"> <time > July 14, 2015 at 7:37 pm </time> </a></div></header><div class='comment_text entry-content-wrapper clearfix' ><p>Scored 8. Honestly, I guessed on a couple, so let's say 6.</p> <a rel="nofollow" class="comment-reply-login" href="https://www.physicsforums.com/insights/wp-login.php?redirect_to=https%3A%2F%2Fwww.physicsforums.com%2Finsights%2Fthink-know-richard-feynman%2F">Log in to Reply</a></div></div></article></div></li><li class="comment even thread-even depth-1" id="li-comment-345"><div id="comment-345"><article><div class="gravatar"></div><div class='comment_content'><header class="comment-header" aria-label="Comment Info" > <cite class="author_name heading"><cite class="comment_author_name">Franco_Carr14</cite></cite> <span class="says">says:</span><div class="comment-meta commentmetadata"> <a href="https://www.physicsforums.com/insights/think-know-richard-feynman/#comment-345"> <time > July 11, 2015 at 4:29 am </time> </a></div></header><div class='comment_text entry-content-wrapper clearfix' ><p>10/12, his books are so inspirational in my opinion,</p> <a rel="nofollow" class="comment-reply-login" href="https://www.physicsforums.com/insights/wp-login.php?redirect_to=https%3A%2F%2Fwww.physicsforums.com%2Finsights%2Fthink-know-richard-feynman%2F">Log in to Reply</a></div></div></article></div></li><li class="comment odd alt thread-odd thread-alt depth-1" id="li-comment-339"><div id="comment-339"><article><div class="gravatar"></div><div class='comment_content'><header class="comment-header" aria-label="Comment Info" > <cite class="author_name heading"><cite class="comment_author_name">Xsnac</cite></cite> <span class="says">says:</span><div class="comment-meta commentmetadata"> <a href="https://www.physicsforums.com/insights/think-know-richard-feynman/#comment-339"> <time > July 10, 2015 at 11:24 am </time> </a></div></header><div class='comment_text entry-content-wrapper clearfix' ><p>6/12</p> <a rel="nofollow" class="comment-reply-login" href="https://www.physicsforums.com/insights/wp-login.php?redirect_to=https%3A%2F%2Fwww.physicsforums.com%2Finsights%2Fthink-know-richard-feynman%2F">Log in to Reply</a></div></div></article></div></li><li class="comment even thread-even depth-1" id="li-comment-281"><div id="comment-281"><article><div class="gravatar"></div><div class='comment_content'><header class="comment-header" aria-label="Comment Info" > <cite class="author_name heading"><cite class="comment_author_name">Mbev</cite></cite> <span class="says">says:</span><div class="comment-meta commentmetadata"> <a href="https://www.physicsforums.com/insights/think-know-richard-feynman/#comment-281"> <time > June 10, 2015 at 12:07 pm </time> </a></div></header><div class='comment_text entry-content-wrapper clearfix' ><p>12/12 unbeatable yes!!</p> <a rel="nofollow" class="comment-reply-login" href="https://www.physicsforums.com/insights/wp-login.php?redirect_to=https%3A%2F%2Fwww.physicsforums.com%2Finsights%2Fthink-know-richard-feynman%2F">Log in to Reply</a></div></div></article></div></li><li class="comment odd alt thread-odd thread-alt depth-1" id="li-comment-178"><div id="comment-178"><article><div class="gravatar"></div><div class='comment_content'><header class="comment-header" aria-label="Comment Info" > <cite class="author_name heading"><cite class="comment_author_name">technotoltec</cite></cite> <span class="says">says:</span><div class="comment-meta commentmetadata"> <a href="https://www.physicsforums.com/insights/think-know-richard-feynman/#comment-178"> <time > May 20, 2015 at 5:31 am </time> </a></div></header><div class='comment_text entry-content-wrapper clearfix' ><p>Though I knew he painted some, but wasn’t he passionate about drumming?</p> <a rel="nofollow" class="comment-reply-login" href="https://www.physicsforums.com/insights/wp-login.php?redirect_to=https%3A%2F%2Fwww.physicsforums.com%2Finsights%2Fthink-know-richard-feynman%2F">Log in to Reply</a></div></div></article></div></li><li class="comment even thread-even depth-1" id="li-comment-175"><div id="comment-175"><article><div class="gravatar"></div><div class='comment_content'><header class="comment-header" aria-label="Comment Info" > <cite class="author_name heading"><cite class="comment_author_name">mabs239</cite></cite> <span class="says">says:</span><div class="comment-meta commentmetadata"> <a href="https://www.physicsforums.com/insights/think-know-richard-feynman/#comment-175"> <time > May 19, 2015 at 7:46 am </time> </a></div></header><div class='comment_text entry-content-wrapper clearfix' ><p>All Guesses.</p> <a rel="nofollow" class="comment-reply-login" href="https://www.physicsforums.com/insights/wp-login.php?redirect_to=https%3A%2F%2Fwww.physicsforums.com%2Finsights%2Fthink-know-richard-feynman%2F">Log in to Reply</a></div></div></article></div></li><li class="comment odd alt thread-odd thread-alt depth-1" id="li-comment-167"><div id="comment-167"><article><div class="gravatar"></div><div class='comment_content'><header class="comment-header" aria-label="Comment Info" > <cite class="author_name heading"><cite class="comment_author_name">Puma</cite></cite> <span class="says">says:</span><div class="comment-meta commentmetadata"> <a href="https://www.physicsforums.com/insights/think-know-richard-feynman/#comment-167"> <time > May 17, 2015 at 6:42 pm </time> </a></div></header><div class='comment_text entry-content-wrapper clearfix' ><p>6 – it’s been a long time since I read his excellent autobiography.</p> <a rel="nofollow" class="comment-reply-login" href="https://www.physicsforums.com/insights/wp-login.php?redirect_to=https%3A%2F%2Fwww.physicsforums.com%2Finsights%2Fthink-know-richard-feynman%2F">Log in to Reply</a></div></div></article></div></li><li class="comment even thread-even depth-1" id="li-comment-134"><div id="comment-134"><article><div class="gravatar"></div><div class='comment_content'><header class="comment-header" aria-label="Comment Info" > <cite class="author_name heading"><cite class="comment_author_name">wabbit</cite></cite> <span class="says">says:</span><div class="comment-meta commentmetadata"> <a href="https://www.physicsforums.com/insights/think-know-richard-feynman/#comment-134"> <time > May 12, 2015 at 11:52 am </time> </a></div></header><div class='comment_text entry-content-wrapper clearfix' ><p>5/12, which is 1.3 sigma above a completely random result. Will wait a bit more before claiming I know something about Feynman : )</p> <a rel="nofollow" class="comment-reply-login" href="https://www.physicsforums.com/insights/wp-login.php?redirect_to=https%3A%2F%2Fwww.physicsforums.com%2Finsights%2Fthink-know-richard-feynman%2F">Log in to Reply</a></div></div></article></div></li><li class="comment odd alt thread-odd thread-alt depth-1" id="li-comment-102"><div id="comment-102"><article><div class="gravatar"></div><div class='comment_content'><header class="comment-header" aria-label="Comment Info" > <cite class="author_name heading"><cite class="comment_author_name">PAllen</cite></cite> <span class="says">says:</span><div class="comment-meta commentmetadata"> <a href="https://www.physicsforums.com/insights/think-know-richard-feynman/#comment-102"> <time > May 8, 2015 at 1:32 pm </time> </a></div></header><div class='comment_text entry-content-wrapper clearfix' ><p>10 / 12.</p> <a rel="nofollow" class="comment-reply-login" href="https://www.physicsforums.com/insights/wp-login.php?redirect_to=https%3A%2F%2Fwww.physicsforums.com%2Finsights%2Fthink-know-richard-feynman%2F">Log in to Reply</a></div></div></article></div></li><li class="comment even thread-even depth-1" id="li-comment-93"><div id="comment-93"><article><div class="gravatar"></div><div class='comment_content'><header class="comment-header" aria-label="Comment Info" > <cite class="author_name heading"><cite class="comment_author_name">Shyan</cite></cite> <span class="says">says:</span><div class="comment-meta commentmetadata"> <a href="https://www.physicsforums.com/insights/think-know-richard-feynman/#comment-93"> <time > May 7, 2015 at 2:01 pm </time> </a></div></header><div class='comment_text entry-content-wrapper clearfix' ><p>10-very good!</p> <a rel="nofollow" class="comment-reply-login" href="https://www.physicsforums.com/insights/wp-login.php?redirect_to=https%3A%2F%2Fwww.physicsforums.com%2Finsights%2Fthink-know-richard-feynman%2F">Log in to Reply</a></div></div></article></div></li><li class="comment odd alt thread-odd thread-alt depth-1" id="li-comment-91"><div id="comment-91"><article><div class="gravatar"></div><div class='comment_content'><header class="comment-header" aria-label="Comment Info" > <cite class="author_name heading"><cite class="comment_author_name">pinball1970</cite></cite> <span class="says">says:</span><div class="comment-meta commentmetadata"> <a href="https://www.physicsforums.com/insights/think-know-richard-feynman/#comment-91"> <time > May 7, 2015 at 12:38 pm </time> </a></div></header><div class='comment_text entry-content-wrapper clearfix' ><p>9. I do better on the trivia than I do understanding the damn physics! Thats why I am here</p> <a rel="nofollow" class="comment-reply-login" href="https://www.physicsforums.com/insights/wp-login.php?redirect_to=https%3A%2F%2Fwww.physicsforums.com%2Finsights%2Fthink-know-richard-feynman%2F">Log in to Reply</a></div></div></article></div></li><li class="comment even thread-even depth-1" id="li-comment-88"><div id="comment-88"><article><div class="gravatar"></div><div class='comment_content'><header class="comment-header" aria-label="Comment Info" > <cite class="author_name heading"><cite class="comment_author_name">KrisOhn</cite></cite> <span class="says">says:</span><div class="comment-meta commentmetadata"> <a href="https://www.physicsforums.com/insights/think-know-richard-feynman/#comment-88"> <time > May 7, 2015 at 3:25 am </time> </a></div></header><div class='comment_text entry-content-wrapper clearfix' ><p>10, I've read most of his books and the ones about him.</p> <a rel="nofollow" class="comment-reply-login" href="https://www.physicsforums.com/insights/wp-login.php?redirect_to=https%3A%2F%2Fwww.physicsforums.com%2Finsights%2Fthink-know-richard-feynman%2F">Log in to Reply</a></div></div></article></div></li><li class="comment odd alt thread-odd thread-alt depth-1" id="li-comment-85"><div id="comment-85"><article><div class="gravatar"></div><div class='comment_content'><header class="comment-header" aria-label="Comment Info" > <cite class="author_name heading"><cite class="comment_author_name">fluidistic</cite></cite> <span class="says">says:</span><div class="comment-meta commentmetadata"> <a href="https://www.physicsforums.com/insights/think-know-richard-feynman/#comment-85"> <time > May 7, 2015 at 1:36 am </time> </a></div></header><div class='comment_text entry-content-wrapper clearfix' ><p>I got 5, but I really knew only 3.</p> <a rel="nofollow" class="comment-reply-login" href="https://www.physicsforums.com/insights/wp-login.php?redirect_to=https%3A%2F%2Fwww.physicsforums.com%2Finsights%2Fthink-know-richard-feynman%2F">Log in to Reply</a></div></div></article></div></li><li class="comment even thread-even depth-1" id="li-comment-84"><div id="comment-84"><article><div class="gravatar"></div><div class='comment_content'><header class="comment-header" aria-label="Comment Info" > <cite class="author_name heading"><cite class="comment_author_name">Stephanus</cite></cite> <span class="says">says:</span><div class="comment-meta commentmetadata"> <a href="https://www.physicsforums.com/insights/think-know-richard-feynman/#comment-84"> <time > May 7, 2015 at 1:04 am </time> </a></div></header><div class='comment_text entry-content-wrapper clearfix' ><p>Einstein was also humorous.</p> <a rel="nofollow" class="comment-reply-login" href="https://www.physicsforums.com/insights/wp-login.php?redirect_to=https%3A%2F%2Fwww.physicsforums.com%2Finsights%2Fthink-know-richard-feynman%2F">Log in to Reply</a></div></div></article></div></li><li class="comment odd alt thread-odd thread-alt depth-1" id="li-comment-83"><div id="comment-83"><article><div class="gravatar"></div><div class='comment_content'><header class="comment-header" aria-label="Comment Info" > <cite class="author_name heading"><cite class="comment_author_name">RaulTheUCSCSlug</cite></cite> <span class="says">says:</span><div class="comment-meta commentmetadata"> <a href="https://www.physicsforums.com/insights/think-know-richard-feynman/#comment-83"> <time > May 7, 2015 at 1:02 am </time> </a></div></header><div class='comment_text entry-content-wrapper clearfix' ><p>I did completely terrible, (as I thought I would) but did enjoy learning some new facts about the Dick himself! I also remember hearing that he was very fond of strippers. And enjoyed learning new facts about the legend himself. 5/12</p> <a rel="nofollow" class="comment-reply-login" href="https://www.physicsforums.com/insights/wp-login.php?redirect_to=https%3A%2F%2Fwww.physicsforums.com%2Finsights%2Fthink-know-richard-feynman%2F">Log in to Reply</a></div></div></article></div></li><li class="comment even thread-even depth-1" id="li-comment-82"><div id="comment-82"><article><div class="gravatar"></div><div class='comment_content'><header class="comment-header" aria-label="Comment Info" > <cite class="author_name heading"><cite class="comment_author_name">ZetaOfThree</cite></cite> <span class="says">says:</span><div class="comment-meta commentmetadata"> <a href="https://www.physicsforums.com/insights/think-know-richard-feynman/#comment-82"> <time > May 6, 2015 at 11:00 pm </time> </a></div></header><div class='comment_text entry-content-wrapper clearfix' ><p>10 out of 12</p> <a rel="nofollow" class="comment-reply-login" href="https://www.physicsforums.com/insights/wp-login.php?redirect_to=https%3A%2F%2Fwww.physicsforums.com%2Finsights%2Fthink-know-richard-feynman%2F">Log in to Reply</a></div></div></article></div></li><li class="comment odd alt thread-odd thread-alt depth-1" id="li-comment-81"><div id="comment-81"><article><div class="gravatar"></div><div class='comment_content'><header class="comment-header" aria-label="Comment Info" > <cite class="author_name heading"><cite class="comment_author_name">muscaria</cite></cite> <span class="says">says:</span><div class="comment-meta commentmetadata"> <a href="https://www.physicsforums.com/insights/think-know-richard-feynman/#comment-81"> <time > May 6, 2015 at 8:54 pm </time> </a></div></header><div class='comment_text entry-content-wrapper clearfix' ><p>10/12 guessed the 1/200 given I knew his IQ test was 125 and they were gonna be mutually exclusive middle answers.. really thought it'd be barber though given it was kind of the odd one out</p> <a rel="nofollow" class="comment-reply-login" href="https://www.physicsforums.com/insights/wp-login.php?redirect_to=https%3A%2F%2Fwww.physicsforums.com%2Finsights%2Fthink-know-richard-feynman%2F">Log in to Reply</a></div></div></article></div></li><li class="comment even thread-even depth-1" id="li-comment-78"><div id="comment-78"><article><div class="gravatar"></div><div class='comment_content'><header class="comment-header" aria-label="Comment Info" > <cite class="author_name heading"><cite class="comment_author_name">Hernik</cite></cite> <span class="says">says:</span><div class="comment-meta commentmetadata"> <a href="https://www.physicsforums.com/insights/think-know-richard-feynman/#comment-78"> <time > May 6, 2015 at 7:36 pm </time> </a></div></header><div class='comment_text entry-content-wrapper clearfix' ><p>8 but I had luck on 5 of my guesses :-)</p> <a rel="nofollow" class="comment-reply-login" href="https://www.physicsforums.com/insights/wp-login.php?redirect_to=https%3A%2F%2Fwww.physicsforums.com%2Finsights%2Fthink-know-richard-feynman%2F">Log in to Reply</a></div></div></article></div></li><li class="comment odd alt thread-odd thread-alt depth-1" id="li-comment-76"><div id="comment-76"><article><div class="gravatar"></div><div class='comment_content'><header class="comment-header" aria-label="Comment Info" > <cite class="author_name heading"><cite class="comment_author_name">diaTonic</cite></cite> <span class="says">says:</span><div class="comment-meta commentmetadata"> <a href="https://www.physicsforums.com/insights/think-know-richard-feynman/#comment-76"> <time > May 6, 2015 at 5:27 pm </time> </a></div></header><div class='comment_text entry-content-wrapper clearfix' ><p>9/12 woo . got the date and IQ wrong because numbers are hard to remember.</p> <a rel="nofollow" class="comment-reply-login" href="https://www.physicsforums.com/insights/wp-login.php?redirect_to=https%3A%2F%2Fwww.physicsforums.com%2Finsights%2Fthink-know-richard-feynman%2F">Log in to Reply</a></div></div></article></div></li><li class="comment even thread-even depth-1" id="li-comment-72"><div id="comment-72"><article><div class="gravatar"></div><div class='comment_content'><header class="comment-header" aria-label="Comment Info" > <cite class="author_name heading"><cite class="comment_author_name">Jimster41</cite></cite> <span class="says">says:</span><div class="comment-meta commentmetadata"> <a href="https://www.physicsforums.com/insights/think-know-richard-feynman/#comment-72"> <time > May 6, 2015 at 3:19 pm </time> </a></div></header><div class='comment_text entry-content-wrapper clearfix' ><p>6 out of twelve, but that's what you get for guessing. Fun quiz.</p> <a rel="nofollow" class="comment-reply-login" href="https://www.physicsforums.com/insights/wp-login.php?redirect_to=https%3A%2F%2Fwww.physicsforums.com%2Finsights%2Fthink-know-richard-feynman%2F">Log in to Reply</a></div></div></article></div></li><li class="comment odd alt thread-odd thread-alt depth-1" id="li-comment-59"><div id="comment-59"><article><div class="gravatar"></div><div class='comment_content'><header class="comment-header" aria-label="Comment Info" > <cite class="author_name heading"><cite class="comment_author_name">UncertaintyAjay</cite></cite> <span class="says">says:</span><div class="comment-meta commentmetadata"> <a href="https://www.physicsforums.com/insights/think-know-richard-feynman/#comment-59"> <time > May 6, 2015 at 12:16 pm </time> </a></div></header><div class='comment_text entry-content-wrapper clearfix' ><p>That being said, it was very informative. Didn’t know he had synesthesia.</p> <a rel="nofollow" class="comment-reply-login" href="https://www.physicsforums.com/insights/wp-login.php?redirect_to=https%3A%2F%2Fwww.physicsforums.com%2Finsights%2Fthink-know-richard-feynman%2F">Log in to Reply</a></div></div></article></div></li><li class="comment even thread-even depth-1" id="li-comment-58"><div id="comment-58"><article><div class="gravatar"></div><div class='comment_content'><header class="comment-header" aria-label="Comment Info" > <cite class="author_name heading"><cite class="comment_author_name">UncertaintyAjay</cite></cite> <span class="says">says:</span><div class="comment-meta commentmetadata"> <a href="https://www.physicsforums.com/insights/think-know-richard-feynman/#comment-58"> <time > May 6, 2015 at 12:13 pm </time> </a></div></header><div class='comment_text entry-content-wrapper clearfix' ><p>9. Woohoo… Told you I’d do better on Feynman than on Einstein.</p> <a rel="nofollow" class="comment-reply-login" href="https://www.physicsforums.com/insights/wp-login.php?redirect_to=https%3A%2F%2Fwww.physicsforums.com%2Finsights%2Fthink-know-richard-feynman%2F">Log in to Reply</a></div></div></article></div></li><li class="comment odd alt thread-odd thread-alt depth-1" id="li-comment-56"><div id="comment-56"><article><div class="gravatar"></div><div class='comment_content'><header class="comment-header" aria-label="Comment Info" > <cite class="author_name heading"><cite class="comment_author_name">Fredrik</cite></cite> <span class="says">says:</span><div class="comment-meta commentmetadata"> <a href="https://www.physicsforums.com/insights/think-know-richard-feynman/#comment-56"> <time > May 6, 2015 at 7:35 am </time> </a></div></header><div class='comment_text entry-content-wrapper clearfix' ><p>I read his autobiographies a long time ago, so I knew a few things, e.g. that he was a painter. But the questions were very difficult. It’s not that easy to know the exact year he won the Nobel (I actually guessed that one right), or that probability that he estimated. It would probably have been better to ask what he got the prize for, or who he shared it with, and to ask what investigation he was involved in.</p> <a rel="nofollow" class="comment-reply-login" href="https://www.physicsforums.com/insights/wp-login.php?redirect_to=https%3A%2F%2Fwww.physicsforums.com%2Finsights%2Fthink-know-richard-feynman%2F">Log in to Reply</a></div></div></article></div></li><li class="comment even thread-even depth-1" id="li-comment-55"><div id="comment-55"><article><div class="gravatar"></div><div class='comment_content'><header class="comment-header" aria-label="Comment Info" > <cite class="author_name heading"><cite class="comment_author_name">rollingstein</cite></cite> <span class="says">says:</span><div class="comment-meta commentmetadata"> <a href="https://www.physicsforums.com/insights/think-know-richard-feynman/#comment-55"> <time > May 6, 2015 at 5:14 am </time> </a></div></header><div class='comment_text entry-content-wrapper clearfix' ><p>I kinda like Feynman more than Einstein. Feynman seems real. Colorful. Human.</p> <a rel="nofollow" class="comment-reply-login" href="https://www.physicsforums.com/insights/wp-login.php?redirect_to=https%3A%2F%2Fwww.physicsforums.com%2Finsights%2Fthink-know-richard-feynman%2F">Log in to Reply</a></div></div></article></div></li><li class="comment odd alt thread-odd thread-alt depth-1" id="li-comment-54"><div id="comment-54"><article><div class="gravatar"></div><div class='comment_content'><header class="comment-header" aria-label="Comment Info" > <cite class="author_name heading"><cite class="comment_author_name">lisab</cite></cite> <span class="says">says:</span><div class="comment-meta commentmetadata"> <a href="https://www.physicsforums.com/insights/think-know-richard-feynman/#comment-54"> <time > May 6, 2015 at 1:59 am </time> </a></div></header><div class='comment_text entry-content-wrapper clearfix' ><p>5. I read his autobiography about 25 years ago, so I’m not surprised.</p> <a rel="nofollow" class="comment-reply-login" href="https://www.physicsforums.com/insights/wp-login.php?redirect_to=https%3A%2F%2Fwww.physicsforums.com%2Finsights%2Fthink-know-richard-feynman%2F">Log in to Reply</a></div></div></article></div></li><li class="comment even thread-even depth-1" id="li-comment-52"><div id="comment-52"><article><div class="gravatar"></div><div class='comment_content'><header class="comment-header" aria-label="Comment Info" > <cite class="author_name heading"><cite class="comment_author_name">nitsuj</cite></cite> <span class="says">says:</span><div class="comment-meta commentmetadata"> <a href="https://www.physicsforums.com/insights/think-know-richard-feynman/#comment-52"> <time > May 5, 2015 at 11:32 pm </time> </a></div></header><div class='comment_text entry-content-wrapper clearfix' ><p>6, all guesses except picking locks, I’ve only read a bit of him, but seen a fair bit of video / lectures, and yeah he is great! I really enjoyed his take on the discovery inquiry, as sincere as he is bright I guess. Hmmm…makes me wonder if there are Einstein lecture videos?</p> <a rel="nofollow" class="comment-reply-login" href="https://www.physicsforums.com/insights/wp-login.php?redirect_to=https%3A%2F%2Fwww.physicsforums.com%2Finsights%2Fthink-know-richard-feynman%2F">Log in to Reply</a></div></div></article></div></li><li class="comment odd alt thread-odd thread-alt depth-1" id="li-comment-51"><div id="comment-51"><article><div class="gravatar"></div><div class='comment_content'><header class="comment-header" aria-label="Comment Info" > <cite class="author_name heading"><cite class="comment_author_name">Arsenic&Lace</cite></cite> <span class="says">says:</span><div class="comment-meta commentmetadata"> <a href="https://www.physicsforums.com/insights/think-know-richard-feynman/#comment-51"> <time > May 5, 2015 at 11:11 pm </time> </a></div></header><div class='comment_text entry-content-wrapper clearfix' ><p>10/12. I don’t know if I am ashamed or proud of this.</p> <a rel="nofollow" class="comment-reply-login" href="https://www.physicsforums.com/insights/wp-login.php?redirect_to=https%3A%2F%2Fwww.physicsforums.com%2Finsights%2Fthink-know-richard-feynman%2F">Log in to Reply</a></div></div></article></div></li><li class="comment even thread-even depth-1" id="li-comment-50"><div id="comment-50"><article><div class="gravatar"></div><div class='comment_content'><header class="comment-header" aria-label="Comment Info" > <cite class="author_name heading"><cite class="comment_author_name">Alex299792458</cite></cite> <span class="says">says:</span><div class="comment-meta commentmetadata"> <a href="https://www.physicsforums.com/insights/think-know-richard-feynman/#comment-50"> <time > May 5, 2015 at 10:50 pm </time> </a></div></header><div class='comment_text entry-content-wrapper clearfix' ><p>I got 11/12 and in my opinion Richard Feynman is my favorite scientist.</p> <a rel="nofollow" class="comment-reply-login" href="https://www.physicsforums.com/insights/wp-login.php?redirect_to=https%3A%2F%2Fwww.physicsforums.com%2Finsights%2Fthink-know-richard-feynman%2F">Log in to Reply</a></div></div></article></div></li><li class="comment odd alt thread-odd thread-alt depth-1" id="li-comment-48"><div id="comment-48"><article><div class="gravatar"></div><div class='comment_content'><header class="comment-header" aria-label="Comment Info" > <cite class="author_name heading"><cite class="comment_author_name">jbunniii</cite></cite> <span class="says">says:</span><div class="comment-meta commentmetadata"> <a href="https://www.physicsforums.com/insights/think-know-richard-feynman/#comment-48"> <time > May 5, 2015 at 9:41 pm </time> </a></div></header><div class='comment_text entry-content-wrapper clearfix' ><p>I didn’t know any of these. Guessed on all of them and got 3/12, as one might expect.</p> <a rel="nofollow" class="comment-reply-login" href="https://www.physicsforums.com/insights/wp-login.php?redirect_to=https%3A%2F%2Fwww.physicsforums.com%2Finsights%2Fthink-know-richard-feynman%2F">Log in to Reply</a></div></div></article></div></li><li class="comment even thread-even depth-1" id="li-comment-47"><div id="comment-47"><article><div class="gravatar"></div><div class='comment_content'><header class="comment-header" aria-label="Comment Info" > <cite class="author_name heading"><cite class="comment_author_name">martinbn</cite></cite> <span class="says">says:</span><div class="comment-meta commentmetadata"> <a href="https://www.physicsforums.com/insights/think-know-richard-feynman/#comment-47"> <time > May 5, 2015 at 9:39 pm </time> </a></div></header><div class='comment_text entry-content-wrapper clearfix' ><p>8/12</p> <a rel="nofollow" class="comment-reply-login" href="https://www.physicsforums.com/insights/wp-login.php?redirect_to=https%3A%2F%2Fwww.physicsforums.com%2Finsights%2Fthink-know-richard-feynman%2F">Log in to Reply</a></div></div></article></div></li><li class="comment odd alt thread-odd thread-alt depth-1" id="li-comment-46"><div id="comment-46"><article><div class="gravatar"></div><div class='comment_content'><header class="comment-header" aria-label="Comment Info" > <cite class="author_name heading"><cite class="comment_author_name">Nim</cite></cite> <span class="says">says:</span><div class="comment-meta commentmetadata"> <a href="https://www.physicsforums.com/insights/think-know-richard-feynman/#comment-46"> <time > May 5, 2015 at 8:26 pm </time> </a></div></header><div class='comment_text entry-content-wrapper clearfix' ><p>6/12</p> <a rel="nofollow" class="comment-reply-login" href="https://www.physicsforums.com/insights/wp-login.php?redirect_to=https%3A%2F%2Fwww.physicsforums.com%2Finsights%2Fthink-know-richard-feynman%2F">Log in to Reply</a></div></div></article></div></li><li class="comment even thread-even depth-1" id="li-comment-44"><div id="comment-44"><article><div class="gravatar"></div><div class='comment_content'><header class="comment-header" aria-label="Comment Info" > <cite class="author_name heading"><cite class="comment_author_name">OmCheeto</cite></cite> <span class="says">says:</span><div class="comment-meta commentmetadata"> <a href="https://www.physicsforums.com/insights/think-know-richard-feynman/#comment-44"> <time > May 5, 2015 at 7:57 pm </time> </a></div></header><div class='comment_text entry-content-wrapper clearfix' ><p>Odd. It’s been only 20 years since I’ve read his biography.</p> <a rel="nofollow" class="comment-reply-login" href="https://www.physicsforums.com/insights/wp-login.php?redirect_to=https%3A%2F%2Fwww.physicsforums.com%2Finsights%2Fthink-know-richard-feynman%2F">Log in to Reply</a></div></div></article></div></li><li class="comment odd alt thread-odd thread-alt depth-1" id="li-comment-42"><div id="comment-42"><article><div class="gravatar"></div><div class='comment_content'><header class="comment-header" aria-label="Comment Info" > <cite class="author_name heading"><cite class="comment_author_name">Greg Bernhardt</cite></cite> <span class="says">says:</span><div class="comment-meta commentmetadata"> <a href="https://www.physicsforums.com/insights/think-know-richard-feynman/#comment-42"> <time > May 5, 2015 at 7:06 pm </time> </a></div></header><div class='comment_text entry-content-wrapper clearfix' ><p>He doesn’t quite reach the level of pop sci fame that Einstein does.</p> <a rel="nofollow" class="comment-reply-login" href="https://www.physicsforums.com/insights/wp-login.php?redirect_to=https%3A%2F%2Fwww.physicsforums.com%2Finsights%2Fthink-know-richard-feynman%2F">Log in to Reply</a></div></div></article></div></li></ol></div><div class="comment_container"><h3 class='miniheading '>Leave a Reply</h3><span class="minitext">Want to join the discussion?<br />Feel free to contribute!</span><div id="respond" class="comment-respond"><h3 id="reply-title" class="comment-reply-title">Leave a Reply <small><a rel="nofollow" id="cancel-comment-reply-link" href="/insights/think-know-richard-feynman/#respond" style="display:none;">Cancel reply</a></small></h3><p class="must-log-in">You must be <a href="https://www.physicsforums.com/insights/wp-login.php?redirect_to=https%3A%2F%2Fwww.physicsforums.com%2Finsights%2Fthink-know-richard-feynman%2F">logged in</a> to post a comment.</p></div></div></div></main><aside class='sidebar sidebar_right smartphones_sidebar_active alpha units' aria-label="Sidebar" role="complementary" itemscope="itemscope" itemtype="https://schema.org/WPSideBar" ><div class="inner_sidebar extralight-border"><section id="custom_html-2" class="widget_text widget clearfix widget_custom_html"><div class="textwidget custom-html-widget"><h2 class="widgettitle">Trending Articles</h2><ul class="wpp-list wpp-sunset"><li class="" style="--item-position: 1;--total-items: 10"><div class="item-position"></div><div class="item-data"><a href="https://www.physicsforums.com/insights/valentines-reflections-mathematical-matters-of-the-heart/" class="wpp-post-title" target="_self">Valentine’s Reflections: Mathematical Matters of the Heart</a></div></li><li class="" style="--item-position: 2;--total-items: 10"><div class="item-position"></div><div class="item-data"><a href="https://www.physicsforums.com/insights/what-is-a-tensor/" class="wpp-post-title" target="_self">What Is a Tensor? The mathematical point of view.</a></div></li><li class="" style="--item-position: 3;--total-items: 10"><div class="item-position"></div><div class="item-data"><a href="https://www.physicsforums.com/insights/hand-wavy-discussion-planck-length/" class="wpp-post-title" target="_self">What Planck Length Is and It’s Common Misconceptions</a></div></li><li class="" style="--item-position: 4;--total-items: 10"><div class="item-position"></div><div class="item-data"><a href="https://www.physicsforums.com/insights/can-see-atom/" class="wpp-post-title" target="_self">Can We See an Atom?</a></div></li><li class="" style="--item-position: 5;--total-items: 10"><div class="item-position"></div><div class="item-data"><a href="https://www.physicsforums.com/insights/all-about-earths-gravity/" class="wpp-post-title" target="_self">Learn All About Earth’s Gravity</a></div></li><li class="" style="--item-position: 6;--total-items: 10"><div class="item-position"></div><div class="item-data"><a href="https://www.physicsforums.com/insights/self-study-basic-high-school-mathematics/" class="wpp-post-title" target="_self">How to Self-Study Basic High School Mathematics</a></div></li><li class="" style="--item-position: 7;--total-items: 10"><div class="item-position"></div><div class="item-data"><a href="https://www.physicsforums.com/insights/visualizing-2-d-particle-box/" class="wpp-post-title" target="_self">How to Visualize the 2-D Particle in a Box</a></div></li><li class="" style="--item-position: 8;--total-items: 10"><div class="item-position"></div><div class="item-data"><a href="https://www.physicsforums.com/insights/how-to-measure-internal-resistance-of-a-battery/" class="wpp-post-title" target="_self">How to Measure Internal Resistance of a Battery</a></div></li><li class="" style="--item-position: 9;--total-items: 10"><div class="item-position"></div><div class="item-data"><a href="https://www.physicsforums.com/insights/groups-the-path-from-a-simple-concept-to-mysterious-results/" class="wpp-post-title" target="_self">Groups, The Path from a Simple Concept to Mysterious Results</a></div></li><li class="" style="--item-position: 10;--total-items: 10"><div class="item-position"></div><div class="item-data"><a href="https://www.physicsforums.com/insights/want-go-back-school/" class="wpp-post-title" target="_self">A Guide to Going Back to School For Math or Science</a></div></li></ul></div><span class="seperator extralight-border"></span></section><section id="nav_menu-3" class="widget clearfix widget_nav_menu"><h3 class="widgettitle">Physics Forums</h3><div class="menu-sidebar-forums-container"><ul id="menu-sidebar-forums" class="menu"><li id="menu-item-26724" class="menu-item menu-item-type-custom menu-item-object-custom menu-item-26724"><a href="https://www.physicsforums.com/forums/classical-physics.61/">Classical Physics</a></li><li id="menu-item-26725" class="menu-item menu-item-type-custom menu-item-object-custom menu-item-26725"><a href="https://www.physicsforums.com/forums/atomic-and-condensed-matter.64/">Atomic and Condensed Matter</a></li><li id="menu-item-26726" class="menu-item menu-item-type-custom menu-item-object-custom menu-item-26726"><a href="https://www.physicsforums.com/forums/quantum-physics.62/">Quantum Physics</a></li><li id="menu-item-26727" class="menu-item menu-item-type-custom menu-item-object-custom menu-item-26727"><a href="https://www.physicsforums.com/forums/special-and-general-relativity.70/">Special and General Relativity</a></li><li id="menu-item-26728" class="menu-item menu-item-type-custom menu-item-object-custom menu-item-26728"><a href="https://www.physicsforums.com/forums/beyond-the-standard-model.66/">Beyond the Standard Model</a></li><li id="menu-item-26729" class="menu-item menu-item-type-custom menu-item-object-custom menu-item-26729"><a href="https://www.physicsforums.com/forums/high-energy-nuclear-particle-physics.65/">High Energy, Nuclear, Particle Physics</a></li><li id="menu-item-26731" class="menu-item menu-item-type-custom menu-item-object-custom menu-item-26731"><a href="https://www.physicsforums.com/forums/astronomy-and-astrophysics.71/">Astronomy and Astrophysics</a></li><li id="menu-item-26732" class="menu-item menu-item-type-custom menu-item-object-custom menu-item-26732"><a href="https://www.physicsforums.com/forums/cosmology.69/">Cosmology</a></li><li id="menu-item-26730" class="menu-item menu-item-type-custom menu-item-object-custom menu-item-26730"><a href="https://www.physicsforums.com/forums/other-physics-topics.111/">Other Physics Topics</a></li></ul></div><span class="seperator extralight-border"></span></section><section id="text-4" class="widget clearfix widget_text"><h3 class="widgettitle">Receive Insights Articles to Your Inbox</h3><div class="textwidget"><form style="border:0px solid #ccc;text-align:left;" action="https://feedburner.google.com/fb/a/mailverify" method="post" target="popupwindow" onsubmit="window.open('https://feedburner.google.com/fb/a/mailverify?uri=PhysicsForumsInsights', 'popupwindow', 'scrollbars=yes,width=550,height=520');return true"><p>Enter your email address:</p><p><input type="text" style="width:200px;border:2px solid #ccc;" name="email"/></p><input type="hidden" value="PhysicsForumsInsights" name="uri"/><input type="hidden" name="loc" value="en_US"/><input type="submit" value="Subscribe" /></p></form></div> <span class="seperator extralight-border"></span></section><section id="nav_menu-2" class="widget clearfix widget_nav_menu"><h3 class="widgettitle">Blog Information</h3><div class="menu-sidebar-container"><ul id="menu-sidebar" class="menu"><li id="menu-item-14015" class="menu-item menu-item-type-custom menu-item-object-custom menu-item-14015"><a href="https://www.physicsforums.com/register">Become a Member!</a></li><li id="menu-item-14012" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-14012"><a href="https://www.physicsforums.com/insights/application/">Write for Us!</a></li><li id="menu-item-18348" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-18348"><a href="https://www.physicsforums.com/insights/postindex/">Table of Contents</a></li><li id="menu-item-18353" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-18353"><a href="https://www.physicsforums.com/insights/authors/">Blog Author List</a></li></ul></div><span class="seperator extralight-border"></span></section><section id="tag_cloud-3" class="widget clearfix widget_tag_cloud"><h3 class="widgettitle">Popular Topics</h3><div class="tagcloud"><a href="https://www.physicsforums.com/insights/tag/astronomy/" class="tag-cloud-link tag-link-307 tag-link-position-1" style="font-size: 9.1666666666667pt;" aria-label="astronomy (17 items)">astronomy<span class="tag-link-count"> (17)</span></a> <a href="https://www.physicsforums.com/insights/tag/black-holes/" class="tag-cloud-link tag-link-28 tag-link-position-2" style="font-size: 9.1666666666667pt;" aria-label="black holes (17 items)">black holes<span class="tag-link-count"> (17)</span></a> <a href="https://www.physicsforums.com/insights/tag/classical-physics/" class="tag-cloud-link tag-link-852 tag-link-position-3" style="font-size: 20.833333333333pt;" aria-label="classical physics (35 items)">classical physics<span class="tag-link-count"> (35)</span></a> <a href="https://www.physicsforums.com/insights/tag/cosmology/" class="tag-cloud-link tag-link-224 tag-link-position-4" style="font-size: 8pt;" aria-label="cosmology (16 items)">cosmology<span class="tag-link-count"> (16)</span></a> <a href="https://www.physicsforums.com/insights/tag/education/" class="tag-cloud-link tag-link-104 tag-link-position-5" style="font-size: 13.833333333333pt;" aria-label="education (23 items)">education<span class="tag-link-count"> (23)</span></a> <a href="https://www.physicsforums.com/insights/tag/electromagnetism/" class="tag-cloud-link tag-link-21 tag-link-position-6" style="font-size: 10.722222222222pt;" aria-label="electromagnetism (19 items)">electromagnetism<span class="tag-link-count"> (19)</span></a> <a href="https://www.physicsforums.com/insights/tag/general-relativity/" class="tag-cloud-link tag-link-333 tag-link-position-7" style="font-size: 10.722222222222pt;" aria-label="general relativity (19 items)">general relativity<span class="tag-link-count"> (19)</span></a> <a href="https://www.physicsforums.com/insights/tag/gravity/" class="tag-cloud-link tag-link-40 tag-link-position-8" style="font-size: 14.611111111111pt;" aria-label="gravity (24 items)">gravity<span class="tag-link-count"> (24)</span></a> <a href="https://www.physicsforums.com/insights/tag/interview/" class="tag-cloud-link tag-link-858 tag-link-position-9" style="font-size: 13.055555555556pt;" aria-label="interview (22 items)">interview<span class="tag-link-count"> (22)</span></a> <a href="https://www.physicsforums.com/insights/tag/mathematics/" class="tag-cloud-link tag-link-69 tag-link-position-10" style="font-size: 22pt;" aria-label="mathematics (38 items)">mathematics<span class="tag-link-count"> (38)</span></a> <a href="https://www.physicsforums.com/insights/tag/mathematics-self-study/" class="tag-cloud-link tag-link-484 tag-link-position-11" style="font-size: 11.5pt;" aria-label="mathematics self-study (20 items)">mathematics self-study<span class="tag-link-count"> (20)</span></a> <a href="https://www.physicsforums.com/insights/tag/physicist/" class="tag-cloud-link tag-link-11 tag-link-position-12" style="font-size: 15.777777777778pt;" aria-label="Physicist (26 items)">Physicist<span class="tag-link-count"> (26)</span></a> <a href="https://www.physicsforums.com/insights/tag/programming/" class="tag-cloud-link tag-link-42 tag-link-position-13" style="font-size: 9.9444444444444pt;" aria-label="programming (18 items)">programming<span class="tag-link-count"> (18)</span></a> <a href="https://www.physicsforums.com/insights/tag/quantum-field-theory/" class="tag-cloud-link tag-link-87 tag-link-position-14" style="font-size: 18.888888888889pt;" aria-label="Quantum Field Theory (31 items)">Quantum Field Theory<span class="tag-link-count"> (31)</span></a> <a href="https://www.physicsforums.com/insights/tag/quantum-mechanics/" class="tag-cloud-link tag-link-62 tag-link-position-15" style="font-size: 21.222222222222pt;" aria-label="quantum mechanics (36 items)">quantum mechanics<span class="tag-link-count"> (36)</span></a> <a href="https://www.physicsforums.com/insights/tag/quantum-physics/" class="tag-cloud-link tag-link-314 tag-link-position-16" style="font-size: 13.055555555556pt;" aria-label="quantum physics (22 items)">quantum physics<span class="tag-link-count"> (22)</span></a> <a href="https://www.physicsforums.com/insights/tag/relativity/" class="tag-cloud-link tag-link-114 tag-link-position-17" style="font-size: 22pt;" aria-label="relativity (38 items)">relativity<span class="tag-link-count"> (38)</span></a> <a href="https://www.physicsforums.com/insights/tag/special-relativity/" class="tag-cloud-link tag-link-89 tag-link-position-18" style="font-size: 8pt;" aria-label="Special Relativity (16 items)">Special Relativity<span class="tag-link-count"> (16)</span></a> <a href="https://www.physicsforums.com/insights/tag/technology/" class="tag-cloud-link tag-link-861 tag-link-position-19" style="font-size: 10.722222222222pt;" aria-label="technology (19 items)">technology<span class="tag-link-count"> (19)</span></a> <a href="https://www.physicsforums.com/insights/tag/universe/" class="tag-cloud-link tag-link-265 tag-link-position-20" style="font-size: 12.277777777778pt;" aria-label="universe (21 items)">universe<span class="tag-link-count"> (21)</span></a></div> <span class="seperator extralight-border"></span></section></div></aside></div></div><footer class='container_wrap socket_color' id='socket' role="contentinfo" itemscope="itemscope" itemtype="https://schema.org/WPFooter" aria-label="Copyright and company info" ><div class='container'><span class='copyright'> 2024 © Physics Forums, ALL RIGHTS RESERVED - <a href="https://www.physicsforums.com/misc/contact">Contact Us</a> - <a href="https://www.physicsforums.com/threads/physics-forums-privacy-policy.797829/">Privacy Policy</a> - <a href="https://www.physicsforums.com/insights/about-pf-insights/">About PF Insights</a></span><ul class='noLightbox social_bookmarks icon_count_4'><li class='social_bookmarks_twitter av-social-link-twitter social_icon_1'><a target="_blank" aria-label="Link to X" href="https://twitter.com/physicsforums" aria-hidden='false' data-av_icon='' data-av_iconfont='entypo-fontello' title='X' rel="noopener"><span class='avia_hidden_link_text'>X</span></a></li><li class='social_bookmarks_facebook av-social-link-facebook social_icon_2'><a target="_blank" aria-label="Link to Facebook" href='https://www.facebook.com/physicsforums' aria-hidden='false' data-av_icon='' data-av_iconfont='entypo-fontello' title='Facebook' rel="noopener"><span class='avia_hidden_link_text'>Facebook</span></a></li><li class='social_bookmarks_linkedin av-social-link-linkedin social_icon_3'><a target="_blank" aria-label="Link to LinkedIn" href='https://www.linkedin.com/company/physics-forums/' aria-hidden='false' data-av_icon='' data-av_iconfont='entypo-fontello' title='LinkedIn' rel="noopener"><span class='avia_hidden_link_text'>LinkedIn</span></a></li><li class='social_bookmarks_youtube av-social-link-youtube social_icon_4'><a target="_blank" aria-label="Link to Youtube" href='https://www.youtube.com/@physicsforum' aria-hidden='false' data-av_icon='' data-av_iconfont='entypo-fontello' title='Youtube' rel="noopener"><span class='avia_hidden_link_text'>Youtube</span></a></li></ul></div></footer></div><a class='avia-post-nav avia-post-prev with-image' href='https://www.physicsforums.com/insights/overcame-learning-challenges-faced-studying-stem/' ><span class="label iconfont" aria-hidden='true' data-av_icon='' data-av_iconfont='entypo-fontello'></span><span class="entry-info-wrap"><span class="entry-info"><span class='entry-title'>Overcoming Learning Challenges Faced Studying Science</span><span class='entry-image'><img data-lazyloaded="1" src="data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSI4MCIgaGVpZ2h0PSI0NSIgdmlld0JveD0iMCAwIDgwIDQ1Ij48cmVjdCB3aWR0aD0iMTAwJSIgaGVpZ2h0PSIxMDAlIiBmaWxsPSIjY2ZkNGRiIi8+PC9zdmc+" loading="lazy" width="80" height="45" data-src="https://www.physicsforums.com/insights/wp-content/uploads/2015/05/studying_adhd1.png" class="wp-image-1555 avia-img-lazy-loading-1555 attachment-thumbnail size-thumbnail wp-post-image" alt="ADHD studying" decoding="async" /><noscript><img loading="lazy" width="80" height="45" src="https://www.physicsforums.com/insights/wp-content/uploads/2015/05/studying_adhd1.png" class="wp-image-1555 avia-img-lazy-loading-1555 attachment-thumbnail size-thumbnail wp-post-image" alt="ADHD studying" decoding="async" /></noscript></span></span></span></a><a class='avia-post-nav avia-post-next with-image' href='https://www.physicsforums.com/insights/frequently-made-errors-mechanics-forces/' ><span class="label iconfont" aria-hidden='true' data-av_icon='' data-av_iconfont='entypo-fontello'></span><span class="entry-info-wrap"><span class="entry-info"><span class='entry-image'><img data-lazyloaded="1" src="data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSI4MCIgaGVpZ2h0PSI0NSIgdmlld0JveD0iMCAwIDgwIDQ1Ij48cmVjdCB3aWR0aD0iMTAwJSIgaGVpZ2h0PSIxMDAlIiBmaWxsPSIjY2ZkNGRiIi8+PC9zdmc+" loading="lazy" width="80" height="45" data-src="https://www.physicsforums.com/insights/wp-content/uploads/2015/05/forcescommonerrors.png" class="wp-image-1556 avia-img-lazy-loading-1556 attachment-thumbnail size-thumbnail wp-post-image" alt="forces mistakes" decoding="async" /><noscript><img loading="lazy" width="80" height="45" src="https://www.physicsforums.com/insights/wp-content/uploads/2015/05/forcescommonerrors.png" class="wp-image-1556 avia-img-lazy-loading-1556 attachment-thumbnail size-thumbnail wp-post-image" alt="forces mistakes" decoding="async" /></noscript></span><span class='entry-title'>Frequently Made Errors in Mechanics: Forces</span></span></span></a></div><a href='#top' title='Scroll to top' id='scroll-top-link' aria-hidden='true' data-av_icon='' data-av_iconfont='entypo-fontello' tabindex='-1'><span class="avia_hidden_link_text">Scroll to top</span></a><div id="fb-root"></div> <script data-optimized="1" type="text/javascript" src="https://www.physicsforums.com/insights/wp-content/litespeed/js/ffe2445567cebbe851874e864ab606aa.js?ver=606aa" defer></script> <script type='text/javascript'>/* */ var avia_framework_globals = avia_framework_globals || {}; avia_framework_globals.frameworkUrl = 'https://www.physicsforums.com/insights/wp-content/themes/enfold/framework/'; avia_framework_globals.installedAt = 'https://www.physicsforums.com/insights/wp-content/themes/enfold/'; avia_framework_globals.ajaxurl = 'https://www.physicsforums.com/insights/wp-admin/admin-ajax.php'; /* */</script> <link data-optimized="1" rel='stylesheet' id='watu-style-css' href='https://www.physicsforums.com/insights/wp-content/litespeed/css/6b0bc56f661a8c64815dc593e482afe0.css?ver=64451' type='text/css' media='all' /> <script type="text/javascript" async='async' src="https://www.physicsforums.com/insights/wp-includes/js/jquery/jquery.min.js?ver=3.7.1" id="jquery-core-js"></script> <script type="text/javascript" id="wpil-frontend-script-js-extra">/* */ var wpilFrontend = {"ajaxUrl":"\/insights\/wp-admin\/admin-ajax.php","postId":"951","postType":"post","openInternalInNewTab":"0","openExternalInNewTab":"1","disableClicks":"0","openLinksWithJS":"0","trackAllElementClicks":"0","clicksI18n":{"imageNoText":"Image in link: No Text","imageText":"Image Title: ","noText":"No Anchor Text Found"}}; /* */</script> <script data-optimized="1" type="text/javascript" async='async' src="https://www.physicsforums.com/insights/wp-content/litespeed/js/32fbbb44e22394d8c0f1ada21cfadab5.js?ver=58fb9" id="wpil-frontend-script-js"></script> <script data-optimized="1" type="text/javascript" async='async' src="https://www.physicsforums.com/insights/wp-content/litespeed/js/28eaaf920db7121b0c5763a98afd6217.js?ver=f2d22" id="comment-reply-js" async="async" data-wp-strategy="async"></script> <script type="text/javascript" id="watu-script-js-extra">/* */ var watu_i18n = {"missed_required_question":"You have missed to answer a required question","nothing_selected":"You did not select any answer. Are you sure you want to continue?","show_answer":"Show Answer","complete_text_captcha":"You need to answer the verification question","try_again":"Try again","email_required":"Valid email address is required.","next_q":"Next >","please_wait":"Please wait...","ajax_url":"https:\/\/www.physicsforums.com\/insights\/wp-admin\/admin-ajax.php"}; var watu_i18n = {"missed_required_question":"You have missed to answer a required question","nothing_selected":"You did not select any answer. Are you sure you want to continue?","show_answer":"Show Answer","complete_text_captcha":"You need to answer the verification question","try_again":"Try again","email_required":"Valid email address is required.","next_q":"Next >","please_wait":"Please wait...","ajax_url":"https:\/\/www.physicsforums.com\/insights\/wp-admin\/admin-ajax.php"}; /* */</script> <script data-optimized="1" type="text/javascript" async='async' src="https://www.physicsforums.com/insights/wp-content/litespeed/js/a34bf397f7ba38a8075f9a4f5bbb8511.js?ver=179c7" id="watu-script-js"></script> <script data-optimized="1" type="text/javascript" async='async' src="https://www.physicsforums.com/insights/wp-content/litespeed/js/5269dc1c70ad20093a6da3e7d95ccca0.js?ver=ccca0" id="avia-footer-scripts-js"></script> <script data-no-optimize="1">!function(t,e){"object"==typeof exports&&"undefined"!=typeof module?module.exports=e():"function"==typeof define&&define.amd?define(e):(t="undefined"!=typeof globalThis?globalThis:t||self).LazyLoad=e()}(this,function(){"use strict";function e(){return(e=Object.assign||function(t){for(var e=1;e<arguments.length;e++){var n,a=arguments[e];for(n in a)Object.prototype.hasOwnProperty.call(a,n)&&(t[n]=a[n])}return t}).apply(this,arguments)}function i(t){return e({},it,t)}function o(t,e){var n,a="LazyLoad::Initialized",i=new t(e);try{n=new CustomEvent(a,{detail:{instance:i}})}catch(t){(n=document.createEvent("CustomEvent")).initCustomEvent(a,!1,!1,{instance:i})}window.dispatchEvent(n)}function l(t,e){return t.getAttribute(gt+e)}function c(t){return l(t,bt)}function s(t,e){return function(t,e,n){e=gt+e;null!==n?t.setAttribute(e,n):t.removeAttribute(e)}(t,bt,e)}function r(t){return s(t,null),0}function u(t){return null===c(t)}function d(t){return c(t)===vt}function f(t,e,n,a){t&&(void 0===a?void 0===n?t(e):t(e,n):t(e,n,a))}function _(t,e){nt?t.classList.add(e):t.className+=(t.className?" ":"")+e}function v(t,e){nt?t.classList.remove(e):t.className=t.className.replace(new RegExp("(^|\\s+)"+e+"(\\s+|$)")," ").replace(/^\s+/,"").replace(/\s+$/,"")}function g(t){return t.llTempImage}function b(t,e){!e||(e=e._observer)&&e.unobserve(t)}function p(t,e){t&&(t.loadingCount+=e)}function h(t,e){t&&(t.toLoadCount=e)}function n(t){for(var e,n=[],a=0;e=t.children[a];a+=1)"SOURCE"===e.tagName&&n.push(e);return n}function m(t,e){(t=t.parentNode)&&"PICTURE"===t.tagName&&n(t).forEach(e)}function a(t,e){n(t).forEach(e)}function E(t){return!!t[st]}function I(t){return t[st]}function y(t){return delete t[st]}function A(e,t){var n;E(e)||(n={},t.forEach(function(t){n[t]=e.getAttribute(t)}),e[st]=n)}function k(a,t){var i;E(a)&&(i=I(a),t.forEach(function(t){var e,n;e=a,(t=i[n=t])?e.setAttribute(n,t):e.removeAttribute(n)}))}function L(t,e,n){_(t,e.class_loading),s(t,ut),n&&(p(n,1),f(e.callback_loading,t,n))}function w(t,e,n){n&&t.setAttribute(e,n)}function x(t,e){w(t,ct,l(t,e.data_sizes)),w(t,rt,l(t,e.data_srcset)),w(t,ot,l(t,e.data_src))}function O(t,e,n){var a=l(t,e.data_bg_multi),i=l(t,e.data_bg_multi_hidpi);(a=at&&i?i:a)&&(t.style.backgroundImage=a,n=n,_(t=t,(e=e).class_applied),s(t,ft),n&&(e.unobserve_completed&&b(t,e),f(e.callback_applied,t,n)))}function N(t,e){!e||0<e.loadingCount||0<e.toLoadCount||f(t.callback_finish,e)}function C(t,e,n){t.addEventListener(e,n),t.llEvLisnrs[e]=n}function M(t){return!!t.llEvLisnrs}function z(t){if(M(t)){var e,n,a=t.llEvLisnrs;for(e in a){var i=a[e];n=e,i=i,t.removeEventListener(n,i)}delete t.llEvLisnrs}}function R(t,e,n){var a;delete t.llTempImage,p(n,-1),(a=n)&&--a.toLoadCount,v(t,e.class_loading),e.unobserve_completed&&b(t,n)}function T(o,r,c){var l=g(o)||o;M(l)||function(t,e,n){M(t)||(t.llEvLisnrs={});var a="VIDEO"===t.tagName?"loadeddata":"load";C(t,a,e),C(t,"error",n)}(l,function(t){var e,n,a,i;n=r,a=c,i=d(e=o),R(e,n,a),_(e,n.class_loaded),s(e,dt),f(n.callback_loaded,e,a),i||N(n,a),z(l)},function(t){var e,n,a,i;n=r,a=c,i=d(e=o),R(e,n,a),_(e,n.class_error),s(e,_t),f(n.callback_error,e,a),i||N(n,a),z(l)})}function G(t,e,n){var a,i,o,r,c;t.llTempImage=document.createElement("IMG"),T(t,e,n),E(c=t)||(c[st]={backgroundImage:c.style.backgroundImage}),o=n,r=l(a=t,(i=e).data_bg),c=l(a,i.data_bg_hidpi),(r=at&&c?c:r)&&(a.style.backgroundImage='url("'.concat(r,'")'),g(a).setAttribute(ot,r),L(a,i,o)),O(t,e,n)}function D(t,e,n){var a;T(t,e,n),a=e,e=n,(t=It[(n=t).tagName])&&(t(n,a),L(n,a,e))}function V(t,e,n){var a;a=t,(-1<yt.indexOf(a.tagName)?D:G)(t,e,n)}function F(t,e,n){var a;t.setAttribute("loading","lazy"),T(t,e,n),a=e,(e=It[(n=t).tagName])&&e(n,a),s(t,vt)}function j(t){t.removeAttribute(ot),t.removeAttribute(rt),t.removeAttribute(ct)}function P(t){m(t,function(t){k(t,Et)}),k(t,Et)}function S(t){var e;(e=At[t.tagName])?e(t):E(e=t)&&(t=I(e),e.style.backgroundImage=t.backgroundImage)}function U(t,e){var n;S(t),n=e,u(e=t)||d(e)||(v(e,n.class_entered),v(e,n.class_exited),v(e,n.class_applied),v(e,n.class_loading),v(e,n.class_loaded),v(e,n.class_error)),r(t),y(t)}function $(t,e,n,a){var i;n.cancel_on_exit&&(c(t)!==ut||"IMG"===t.tagName&&(z(t),m(i=t,function(t){j(t)}),j(i),P(t),v(t,n.class_loading),p(a,-1),r(t),f(n.callback_cancel,t,e,a)))}function q(t,e,n,a){var i,o,r=(o=t,0<=pt.indexOf(c(o)));s(t,"entered"),_(t,n.class_entered),v(t,n.class_exited),i=t,o=a,n.unobserve_entered&&b(i,o),f(n.callback_enter,t,e,a),r||V(t,n,a)}function H(t){return t.use_native&&"loading"in HTMLImageElement.prototype}function B(t,i,o){t.forEach(function(t){return(a=t).isIntersecting||0<a.intersectionRatio?q(t.target,t,i,o):(e=t.target,n=t,a=i,t=o,void(u(e)||(_(e,a.class_exited),$(e,n,a,t),f(a.callback_exit,e,n,t))));var e,n,a})}function J(e,n){var t;et&&!H(e)&&(n._observer=new IntersectionObserver(function(t){B(t,e,n)},{root:(t=e).container===document?null:t.container,rootMargin:t.thresholds||t.threshold+"px"}))}function K(t){return Array.prototype.slice.call(t)}function Q(t){return t.container.querySelectorAll(t.elements_selector)}function W(t){return c(t)===_t}function X(t,e){return e=t||Q(e),K(e).filter(u)}function Y(e,t){var n;(n=Q(e),K(n).filter(W)).forEach(function(t){v(t,e.class_error),r(t)}),t.update()}function t(t,e){var n,a,t=i(t);this._settings=t,this.loadingCount=0,J(t,this),n=t,a=this,Z&&window.addEventListener("online",function(){Y(n,a)}),this.update(e)}var Z="undefined"!=typeof window,tt=Z&&!("onscroll"in window)||"undefined"!=typeof navigator&&/(gle|ing|ro)bot|crawl|spider/i.test(navigator.userAgent),et=Z&&"IntersectionObserver"in window,nt=Z&&"classList"in document.createElement("p"),at=Z&&1<window.devicePixelRatio,it={elements_selector:".lazy",container:tt||Z?document:null,threshold:300,thresholds:null,data_src:"src",data_srcset:"srcset",data_sizes:"sizes",data_bg:"bg",data_bg_hidpi:"bg-hidpi",data_bg_multi:"bg-multi",data_bg_multi_hidpi:"bg-multi-hidpi",data_poster:"poster",class_applied:"applied",class_loading:"litespeed-loading",class_loaded:"litespeed-loaded",class_error:"error",class_entered:"entered",class_exited:"exited",unobserve_completed:!0,unobserve_entered:!1,cancel_on_exit:!0,callback_enter:null,callback_exit:null,callback_applied:null,callback_loading:null,callback_loaded:null,callback_error:null,callback_finish:null,callback_cancel:null,use_native:!1},ot="src",rt="srcset",ct="sizes",lt="poster",st="llOriginalAttrs",ut="loading",dt="loaded",ft="applied",_t="error",vt="native",gt="data-",bt="ll-status",pt=[ut,dt,ft,_t],ht=[ot],mt=[ot,lt],Et=[ot,rt,ct],It={IMG:function(t,e){m(t,function(t){A(t,Et),x(t,e)}),A(t,Et),x(t,e)},IFRAME:function(t,e){A(t,ht),w(t,ot,l(t,e.data_src))},VIDEO:function(t,e){a(t,function(t){A(t,ht),w(t,ot,l(t,e.data_src))}),A(t,mt),w(t,lt,l(t,e.data_poster)),w(t,ot,l(t,e.data_src)),t.load()}},yt=["IMG","IFRAME","VIDEO"],At={IMG:P,IFRAME:function(t){k(t,ht)},VIDEO:function(t){a(t,function(t){k(t,ht)}),k(t,mt),t.load()}},kt=["IMG","IFRAME","VIDEO"];return t.prototype={update:function(t){var e,n,a,i=this._settings,o=X(t,i);{if(h(this,o.length),!tt&&et)return H(i)?(e=i,n=this,o.forEach(function(t){-1!==kt.indexOf(t.tagName)&&F(t,e,n)}),void h(n,0)):(t=this._observer,i=o,t.disconnect(),a=t,void i.forEach(function(t){a.observe(t)}));this.loadAll(o)}},destroy:function(){this._observer&&this._observer.disconnect(),Q(this._settings).forEach(function(t){y(t)}),delete this._observer,delete this._settings,delete this.loadingCount,delete this.toLoadCount},loadAll:function(t){var e=this,n=this._settings;X(t,n).forEach(function(t){b(t,e),V(t,n,e)})},restoreAll:function(){var e=this._settings;Q(e).forEach(function(t){U(t,e)})}},t.load=function(t,e){e=i(e);V(t,e)},t.resetStatus=function(t){r(t)},Z&&function(t,e){if(e)if(e.length)for(var n,a=0;n=e[a];a+=1)o(t,n);else o(t,e)}(t,window.lazyLoadOptions),t});!function(e,t){"use strict";function a(){t.body.classList.add("litespeed_lazyloaded")}function n(){console.log("[LiteSpeed] Start Lazy Load Images"),d=new LazyLoad({elements_selector:"[data-lazyloaded]",callback_finish:a}),o=function(){d.update()},e.MutationObserver&&new MutationObserver(o).observe(t.documentElement,{childList:!0,subtree:!0,attributes:!0})}var d,o;e.addEventListener?e.addEventListener("load",n,!1):e.attachEvent("onload",n)}(window,document);</script></body></html> <!-- Page optimized by LiteSpeed Cache @2025-02-17 21:19:07 --> <!-- Page cached by LiteSpeed Cache 6.5.4 on 2025-02-17 21:19:07 -->