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30px; } .exp-invert-logo #yt-masthead #logo-container .logo-red { background: no-repeat url(/web/20200211041839im_/https://www.youtube.com/yts/img/ringo/hitchhiker/logo_youtube_red_2x-vflOSHA_n.png); background-size: 132px 30px; } @media only screen and (min-width: 0px) and (max-width: 498px), only screen and (min-width: 499px) and (max-width: 704px) { .exp-invert-logo.exp-responsive #yt-masthead #logo-container { background: no-repeat url(/web/20200211041839im_/https://www.youtube.com/yts/img/ringo/hitchhiker/yt_play_logo_2x-vflXx5Pg3.png); background-size: 40px 28px; } } .guide-sort-container {display: none}</style></head> <body dir="ltr" id="body" class=" visibility-logging-enabled ltr exp-invert-logo exp-kevlar-settings exp-mouseover-img exp-responsive exp-search-big-thumbs site-center-aligned site-as-giant-card appbar-hidden not-nirvana-dogfood flex-width-enabled flex-width-enabled-snap delayed-frame-styles-not-in " data-spf-name="watch"> <div id="early-body"></div><div id="body-container"><div id="a11y-announcements-container" role="alert"><div id="a11y-announcements-message"></div></div><form name="logoutForm" method="POST" action="/web/20200211041839/https://www.youtube.com/logout"><input type="hidden" name="action_logout" value="1"></form><div id="masthead-positioner"> <div id="ticker-content"> </div> <div id="yt-masthead-container" class="clearfix yt-base-gutter"> <button id="a11y-skip-nav" class="skip-nav" data-target-id="main" tabindex="3"> Пропустить </button> <div id="yt-masthead"><div class="yt-masthead-logo-container "> <button class="yt-uix-button yt-uix-button-size-default yt-uix-button-text yt-uix-button-empty yt-uix-button-has-icon appbar-guide-toggle appbar-guide-clickable-ancestor" type="button" onclick=";return false;" aria-controls="appbar-guide-menu" aria-label="Гид" id="appbar-guide-button"><span class="yt-uix-button-icon-wrapper"><span class="yt-uix-button-icon yt-uix-button-icon-appbar-guide yt-sprite"></span></span></button> <div id="appbar-main-guide-notification-container"></div> <a id="logo-container" href="/web/20200211041839/https://www.youtube.com/" title="Главная страница YouTube" class=" spf-link masthead-logo-renderer yt-uix-sessionlink" data-sessionlink=""><span class="logo masthead-logo-renderer-logo yt-sprite" title="Главная страница YouTube"></span><span class="content-region">NG</span></a> </div><div id="yt-masthead-signin"> <a href="//web.archive.org/web/20200211041839/https://www.youtube.com/upload" class="yt-uix-button yt-uix-sessionlink yt-uix-button-opacity yt-uix-button-size-default yt-uix-button-has-icon yt-uix-tooltip yt-uix-button-empty" data-sessionlink="ei=HytCXouAOIOjkgaqkLHADw&feature=mhsb" id="upload-btn" title="Добавить видео"><span class="yt-uix-button-icon-wrapper"><span class="yt-uix-button-icon yt-uix-button-icon-material-upload yt-sprite"></span></span></a> <div class="signin-container "><button class="yt-uix-button yt-uix-button-size-default yt-uix-button-primary" type="button" onclick=";window.location.href=this.getAttribute('href');return false;" role="link" href="https://accounts.google.com/ServiceLogin?uilel=3&hl=ru&passive=true&service=youtube&continue=https%3A%2F%2Fwww.youtube.com%2Fsignin%3Ffeature%3Dsign_in_button%26hl%3Dru%26next%3D%252Fwatch%253Fv%253DUA1qG7Fjc2A%26action_handle_signin%3Dtrue%26app%3Ddesktop"><span class="yt-uix-button-content">Войти</span></button></div></div><div id="yt-masthead-content"><form id="masthead-search" class=" search-form consolidated-form vve-check" action="/web/20200211041839/https://www.youtube.com/results" onsubmit="if (document.getElementById('masthead-search-term').value == '') return false;" data-clicktracking="CAIQ7VAiEwjLi5-00sjnAhWDkcQKHSpIDPgo-B0" data-visibility-tracking="CAIQ7VAiEwjLi5-00sjnAhWDkcQKHSpIDPgo-B0"><button class="yt-uix-button yt-uix-button-size-default yt-uix-button-default search-btn-component search-button" type="submit" onclick="if 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data-close-parent-class="yt-alert"><span class="yt-uix-button-content">Закрыть</span></button></div></div> </div></div><div id="header"></div><div id="player" class=" content-alignment watch-small " role="complementary"><div id="theater-background" class="player-height"></div> <div id="player-mole-container"> <div id="player-unavailable" class=" hid player-width player-height player-unavailable "> <img class="icon meh" src="/web/20200211041839im_/https://www.youtube.com/yts/img/pixel-vfl3z5WfW.gif" data-icon="/yts/img/meh7-vflGevej7.png" alt=""> <div class="content"> <h1 id="unavailable-message" class="message"> Это видео недоступно. </h1> <div id="unavailable-submessage" class="submessage"> </div> </div> </div> <div id="player-api" class="player-width player-height off-screen-target player-api" tabindex="-1"></div> <script>if (window.ytcsi) {window.ytcsi.tick("cfg", null, '');}</script> <script>var ytplayer = ytplayer || {};ytplayer.config = 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content="AD,AE,AF,AG,AI,AL,AM,AO,AQ,AR,AS,AT,AU,AW,AX,AZ,BA,BB,BD,BE,BF,BG,BH,BI,BJ,BL,BM,BN,BO,BQ,BR,BS,BT,BV,BW,BY,BZ,CA,CC,CD,CF,CG,CH,CI,CK,CL,CM,CN,CO,CR,CU,CV,CW,CX,CY,CZ,DE,DJ,DK,DM,DO,DZ,EC,EE,EG,EH,ER,ES,ET,FI,FJ,FK,FM,FO,FR,GA,GB,GD,GE,GF,GG,GH,GI,GL,GM,GN,GP,GQ,GR,GS,GT,GU,GW,GY,HK,HM,HN,HR,HT,HU,ID,IE,IL,IM,IN,IO,IQ,IR,IS,IT,JE,JM,JO,JP,KE,KG,KH,KI,KM,KN,KP,KR,KW,KY,KZ,LA,LB,LC,LI,LK,LR,LS,LT,LU,LV,LY,MA,MC,MD,ME,MF,MG,MH,MK,ML,MM,MN,MO,MP,MQ,MR,MS,MT,MU,MV,MW,MX,MY,MZ,NA,NC,NE,NF,NG,NI,NL,NO,NP,NR,NU,NZ,OM,PA,PE,PF,PG,PH,PK,PL,PM,PN,PR,PS,PT,PW,PY,QA,RE,RO,RS,RU,RW,SA,SB,SC,SD,SE,SG,SH,SI,SJ,SK,SL,SM,SN,SO,SR,SS,ST,SV,SX,SY,SZ,TC,TD,TF,TG,TH,TJ,TK,TL,TM,TN,TO,TR,TT,TV,TW,TZ,UA,UG,UM,US,UY,UZ,VA,VC,VE,VG,VI,VN,VU,WF,WS,YE,YT,ZA,ZM,ZW"> <meta itemprop="interactionCount" content="206266"> <meta itemprop="datePublished" content="2016-02-17"> <meta itemprop="uploadDate" content="2016-02-17"> <meta itemprop="genre" content="Entertainment"> <div id="watch7-speedyg-area"> <div 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class="clearfix"> <div id="watch-headline-title"> <h1 class="watch-title-container"> <span id="eow-title" class="watch-title" dir="ltr" title="Interferometer Animation"> Interferometer Animation </span> </h1> </div> </div> <div id="watch7-user-header" class=" spf-link "> <a href="/web/20200211041839/https://www.youtube.com/user/comunicazioneINFN" class="yt-user-photo yt-uix-sessionlink spf-link " data-sessionlink="itct=CC4Q4TkiEwiomqO00sjnAhXTy8QKHSyfAxQ"> <span class="video-thumb yt-thumb yt-thumb-48"> <span class="yt-thumb-square"> <span class="yt-thumb-clip"> <img data-thumb="https://web.archive.org/web/20200211041839/https://yt3.ggpht.com/a/AGF-l79d8bbwsvRUbuVrQqv0Q0rZjxApBbgePdGqbw=s48-c-k-c0xffffffff-no-rj-mo" alt="Infn Comunicazione" width="48" data-ytimg="1" height="48" onload=";window.__ytRIL && __ytRIL(this)" src="/web/20200211041839im_/https://www.youtube.com/yts/img/pixel-vfl3z5WfW.gif"> <span class="vertical-align"></span> </span> </span> </span> </a> <div 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после аренды видео-</strong> </div> </div> <div id="action-panel-error" class="action-panel-content hid"> <div class="action-panel-error"> В данный момент эта функция недоступна. Повторите попытку позже. </div> </div> <button class="yt-uix-button yt-uix-button-size-default yt-uix-button-default yt-uix-button-empty yt-uix-button-has-icon no-icon-markup yt-uix-button-opacity yt-uix-close" type="button" onclick=";return false;" id="action-panel-dismiss" aria-label="Закрыть" data-close-parent-id="watch8-action-panels"></button> </div> <div id="promotion-shelf" class="promotion-shelf-slot yt-card yt-card-has-padding hid"></div> <div id="action-panel-details" class="action-panel-content yt-uix-expander yt-card yt-card-has-padding yt-uix-expander-collapsed"><div id="watch-description" class="yt-uix-button-panel"><div id="watch-description-content"><div id="watch-description-clip"><div id="watch-uploader-info"><strong class="watch-time-text">Опубликовано: 17 февр. 2016 г.</strong></div><div id="watch-description-text" class=""><p id="eow-description" class="">Most Precise Ruler Ever Constructed<br/><br/>This animation illustrates how the twin observatories of LIGO work. One observatory is in Hanford, Washington, the other in Livingston, Louisiana. Each houses a large-scale interferometer, a device that uses the interference of two beams of laser light to make the most precise distance measurements in the world.<br/><br/>The animation begins with a simplified depiction of the LIGO instrument. A laser beam of light is generated and directed toward a beam splitter, which splits it into two separate and equal beams. The light beams then travel perpendicularly to a distant mirror, with each arm of the device being 4 kilometers in length. The mirrors reflect the light back to the beam splitter, repeating this process 200 times.<br/><br/>When gravitational waves pass through this device, they cause the length of the two arms to alternately stretch and squeeze by infinitesimal amounts, tremendously exaggerated here for visibility. This movement causes the light beam that hits the detector to flicker.<br/><br/>The second half of the animation explains the flickering, and this is where light interference comes into play. After the two beams reflect off the mirrors, they meet at the beam splitter, where the light is recombined in a process called interference. Normally, when no gravitational waves are present, the distance between the beam splitter and the mirror is precisely controlled so that the light waves are kept out of phase with each other and cancel each other out. The result is that no light hits the detectors.<br/><br/>But when gravitational waves pass through the system, the distance between the end mirrors and the beam splitter lengthen in one arm and at the same time shorten in the other arm in such a way that the light waves from the two arms go in and out of phase with each other. When the light waves are in phase with each other, they add together constructively and produce a bright beam that illuminates the detectors. When they are out of phase, they cancel each other out and there is no signal. Thus, the gravitational waves from a major cosmic event, like the merger of two black holes, will cause the signal to flicker, as seen here.<br/><br/>By digitizing and recording the specific patterns of signals that hit the LIGO detectors, researchers can then analyze what they see and compare the data to computer models of predicted gravitational wave signals.<br/><br/>The effects of the gravitational waves on the LIGO instrument have been vastly exaggerated in this video to demonstrate how it works. In reality, the changes in the lengths of the instrument's arms is only 1/1000th the size of a proton. Other characteristics of LIGO, such as the exquisite stability of its mirrors, also contribute to its ability to precisely measures distances. In fact, LIGO can be thought of as the most precise "ruler" in the world.<br/><br/>Image credit: LIGO/T. Pyle</p></div> <div id="watch-description-extras"> <ul class="watch-extras-section"> <li class="watch-meta-item yt-uix-expander-body"> <h4 class="title"> Категория </h4> <ul class="content watch-info-tag-list"> <li><a href="/web/20200211041839/https://www.youtube.com/channel/UCi-g4cjqGV7jvU8aeSuj0jQ" class=" yt-uix-sessionlink spf-link " data-sessionlink="ei=HytCXouAOIOjkgaqkLHADw">Развлечения</a></li> </ul> </li> </ul> </div> </div></div></div> <button class="yt-uix-button yt-uix-button-size-default yt-uix-button-expander yt-uix-expander-head yt-uix-expander-collapsed-body yt-uix-gen204" type="button" onclick=";return false;" data-gen204="feature=watch-show-more-metadata"><span class="yt-uix-button-content">Ещё</span></button> <button class="yt-uix-button yt-uix-button-size-default yt-uix-button-expander yt-uix-expander-head yt-uix-expander-body" type="button" onclick=";return false;"><span class="yt-uix-button-content">Свернуть</span></button> </div> <div id="watch-discussion" class="branded-page-box yt-card"> <div class="action-panel-loading"> <p class="yt-spinner "> <span class="yt-spinner-img yt-sprite" title="Загрузка значка..."></span> <span class="yt-spinner-message"> Загрузка... </span> </p> </div> </div> </div> <div id="watch7-sidebar" class="watch-sidebar"> <div id="placeholder-playlist" class="watch-playlist player-height hid"></div> <div id="watch7-sidebar-contents" class="watch-sidebar-gutter yt-card yt-card-has-padding yt-uix-expander yt-uix-expander-collapsed"> <div id="watch7-sidebar-offer"> </div> <div id="watch7-sidebar-ads"> <div id="watch-channel-brand-div" class=""> <div id="watch-channel-brand-div-text"> Реклама </div> <div id="google_companion_ad_div"> </div> </div> </div> <div id="watch7-sidebar-modules"> <div class="watch-sidebar-section"> <div class="autoplay-bar"> <div class="checkbox-on-off"> <label for="autoplay-checkbox">Автовоспроизведение</label> <span class="autoplay-hovercard yt-uix-hovercard"> <span class="autoplay-info-icon yt-uix-button-opacity yt-uix-hovercard-target yt-sprite" data-orientation="vertical" data-position="topright"></span> <span class="yt-uix-hovercard-content">Если функция включена, то следующий ролик начнет воспроизводиться автоматически.</span> </span> <span class="yt-uix-checkbox-on-off "> <input id="autoplay-checkbox" class="" type="checkbox" name="" checked><label for="autoplay-checkbox" id="autoplay-checkbox-label"><span class="checked"></span><span class="toggle"></span><span class="unchecked"></span></label> </span> </div> <h4 class="watch-sidebar-head"> Следующее </h4> <div class="watch-sidebar-body"> <ul class="video-list"> <li class="video-list-item related-list-item show-video-time"> <div class="content-wrapper"> <a href="/web/20200211041839/https://www.youtube.com/watch?v=RRi4dv9KgCg" class=" content-link spf-link yt-uix-sessionlink spf-link " data-sessionlink="itct=CCUQpDAYACITCKiao7TSyOcCFdPLxAodLJ8DFDIHYXV0b25hdkjg5o2Lu8PahlA" rel=" spf-prefetch nofollow" title="Optics: Destructive interference - 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One observatory is in Hanford, Washington, the other in Livingston, Louisiana. Each houses a large-scale interferometer, a device that uses the interference of two beams of laser light to make the most precise distance measurements in the world.\\n\\nThe animation begins with a simplified depiction of the LIGO instrument. A laser beam of light is generated and directed toward a beam splitter, which splits it into two separate and equal beams. The light beams then travel perpendicularly to a distant mirror, with each arm of the device being 4 kilometers in length. The mirrors reflect the light back to the beam splitter, repeating this process 200 times.\\n\\nWhen gravitational waves pass through this device, they cause the length of the two arms to alternately stretch and squeeze by infinitesimal amounts, tremendously exaggerated here for visibility. This movement causes the light beam that hits the detector to flicker.\\n\\nThe second half of the animation explains the flickering, and this is where light interference comes into play. After the two beams reflect off the mirrors, they meet at the beam splitter, where the light is recombined in a process called interference. Normally, when no gravitational waves are present, the distance between the beam splitter and the mirror is precisely controlled so that the light waves are kept out of phase with each other and cancel each other out. The result is that no light hits the detectors.\\n\\nBut when gravitational waves pass through the system, the distance between the end mirrors and the beam splitter lengthen in one arm and at the same time shorten in the other arm in such a way that the light waves from the two arms go in and out of phase with each other. 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