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data-event-name="pinnable-header.vector-toc.pin">mover á barra lateral</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-toc.unpin">agochar</button> </div> <ul class="vector-toc-contents" id="mw-panel-toc-list"> <li id="toc-mw-content-text" class="vector-toc-list-item vector-toc-level-1"> <a href="#" class="vector-toc-link"> <div class="vector-toc-text">Inicio</div> </a> </li> <li id="toc-Leis_da_reflexión" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Leis_da_reflexión"> <div class="vector-toc-text"> <span class="vector-toc-numb">1</span> <span>Leis da reflexión</span> </div> </a> <ul id="toc-Leis_da_reflexión-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Explicación_teórica" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Explicación_teórica"> <div class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>Explicación teórica</span> </div> </a> <ul id="toc-Explicación_teórica-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Utilización" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Utilización"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Utilización</span> </div> </a> <ul id="toc-Utilización-sublist" class="vector-toc-list"> </ul> </li> </ul> </div> </div> </nav> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <nav aria-label="Contidos" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc vector-button-flush-left" > <input type="checkbox" id="vector-page-titlebar-toc-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-titlebar-toc" class="vector-dropdown-checkbox " aria-label="Mostrar ou agochar a táboa de contidos" > <label id="vector-page-titlebar-toc-label" for="vector-page-titlebar-toc-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-listBullet mw-ui-icon-wikimedia-listBullet"></span> <span class="vector-dropdown-label-text">Mostrar ou agochar a táboa de contidos</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-titlebar-toc-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">Reflexión (física)</span></h1> <div id="p-lang-btn" class="vector-dropdown mw-portlet mw-portlet-lang" > <input type="checkbox" id="p-lang-btn-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-p-lang-btn" class="vector-dropdown-checkbox mw-interlanguage-selector" aria-label="Ir a un artigo noutra lingua. Dispoñible en 80 linguas" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-80" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">80 linguas</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-af mw-list-item"><a href="https://af.wikipedia.org/wiki/Refleksie" title="Refleksie – afrikaans" lang="af" hreflang="af" data-title="Refleksie" data-language-autonym="Afrikaans" data-language-local-name="afrikaans" class="interlanguage-link-target"><span>Afrikaans</span></a></li><li class="interlanguage-link interwiki-am mw-list-item"><a href="https://am.wikipedia.org/wiki/%E1%8B%A8%E1%89%A5%E1%88%AD%E1%88%83%E1%8A%95_%E1%8A%90%E1%8C%B8%E1%89%A5%E1%88%AB%E1%89%85" title="የብርሃን ነጸብራቅ – amhárico" lang="am" hreflang="am" data-title="የብርሃን ነጸብራቅ" data-language-autonym="አማርኛ" data-language-local-name="amhárico" class="interlanguage-link-target"><span>አማርኛ</span></a></li><li class="interlanguage-link interwiki-an mw-list-item"><a href="https://an.wikipedia.org/wiki/Reflexi%C3%B3n_(fisica)" title="Reflexión (fisica) – aragonés" lang="an" hreflang="an" data-title="Reflexión (fisica)" data-language-autonym="Aragonés" data-language-local-name="aragonés" class="interlanguage-link-target"><span>Aragonés</span></a></li><li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D8%A7%D9%86%D8%B9%D9%83%D8%A7%D8%B3_(%D9%81%D9%8A%D8%B2%D9%8A%D8%A7%D8%A1)" title="انعكاس (فيزياء) – árabe" lang="ar" hreflang="ar" data-title="انعكاس (فيزياء)" data-language-autonym="العربية" data-language-local-name="árabe" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-az mw-list-item"><a href="https://az.wikipedia.org/wiki/%C4%B0%C5%9F%C4%B1%C4%9F%C4%B1n_qay%C4%B1tmas%C4%B1" title="İşığın qayıtması – acerbaixano" lang="az" hreflang="az" data-title="İşığın qayıtması" data-language-autonym="Azərbaycanca" data-language-local-name="acerbaixano" class="interlanguage-link-target"><span>Azərbaycanca</span></a></li><li class="interlanguage-link interwiki-bew mw-list-item"><a href="https://bew.wikipedia.org/wiki/T%C3%A8ktokan" title="Tèktokan – Betawi" lang="bew" hreflang="bew" data-title="Tèktokan" data-language-autonym="Betawi" data-language-local-name="Betawi" class="interlanguage-link-target"><span>Betawi</span></a></li><li class="interlanguage-link interwiki-bg mw-list-item"><a href="https://bg.wikipedia.org/wiki/%D0%9E%D1%82%D1%80%D0%B0%D0%B6%D0%B5%D0%BD%D0%B8%D0%B5" title="Отражение – búlgaro" lang="bg" hreflang="bg" data-title="Отражение" data-language-autonym="Български" data-language-local-name="búlgaro" class="interlanguage-link-target"><span>Български</span></a></li><li class="interlanguage-link interwiki-bn mw-list-item"><a href="https://bn.wikipedia.org/wiki/%E0%A6%AA%E0%A7%8D%E0%A6%B0%E0%A6%A4%E0%A6%BF%E0%A6%AB%E0%A6%B2%E0%A6%A8_(%E0%A6%AA%E0%A6%A6%E0%A6%BE%E0%A6%B0%E0%A7%8D%E0%A6%A5%E0%A6%AC%E0%A6%BF%E0%A6%9C%E0%A7%8D%E0%A6%9E%E0%A6%BE%E0%A6%A8)" title="প্রতিফলন (পদার্থবিজ্ঞান) – bengalí" lang="bn" hreflang="bn" data-title="প্রতিফলন (পদার্থবিজ্ঞান)" data-language-autonym="বাংলা" data-language-local-name="bengalí" class="interlanguage-link-target"><span>বাংলা</span></a></li><li class="interlanguage-link interwiki-bs mw-list-item"><a href="https://bs.wikipedia.org/wiki/Refleksija_(fizika)" title="Refleksija (fizika) – bosníaco" lang="bs" hreflang="bs" data-title="Refleksija (fizika)" data-language-autonym="Bosanski" data-language-local-name="bosníaco" class="interlanguage-link-target"><span>Bosanski</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/Reflexi%C3%B3" title="Reflexió – catalán" lang="ca" hreflang="ca" data-title="Reflexió" data-language-autonym="Català" data-language-local-name="catalán" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-ckb mw-list-item"><a href="https://ckb.wikipedia.org/wiki/%D9%88%DB%8E%D9%86%DB%95%D8%AF%D8%A7%D9%86%DB%95%D9%88%DB%95" title="وێنەدانەوە – kurdo central" lang="ckb" hreflang="ckb" data-title="وێنەدانەوە" data-language-autonym="کوردی" data-language-local-name="kurdo central" class="interlanguage-link-target"><span>کوردی</span></a></li><li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikipedia.org/wiki/Odraz_vln%C4%9Bn%C3%AD" title="Odraz vlnění – checo" lang="cs" hreflang="cs" data-title="Odraz vlnění" data-language-autonym="Čeština" data-language-local-name="checo" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-cv mw-list-item"><a href="https://cv.wikipedia.org/wiki/%D0%A1%D1%83%D0%BB%C4%83%D0%BD%D1%83_(%D1%84%D0%B8%D0%B7%D0%B8%D0%BA%D0%B0)" title="Сулăну (физика) – chuvaxo" lang="cv" hreflang="cv" data-title="Сулăну (физика)" data-language-autonym="Чӑвашла" data-language-local-name="chuvaxo" class="interlanguage-link-target"><span>Чӑвашла</span></a></li><li class="interlanguage-link interwiki-da mw-list-item"><a href="https://da.wikipedia.org/wiki/Refleksion_(fysik)" title="Refleksion (fysik) – dinamarqués" lang="da" hreflang="da" data-title="Refleksion (fysik)" data-language-autonym="Dansk" data-language-local-name="dinamarqués" class="interlanguage-link-target"><span>Dansk</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Reflexion_(Physik)" title="Reflexion (Physik) – alemán" lang="de" hreflang="de" data-title="Reflexion (Physik)" data-language-autonym="Deutsch" data-language-local-name="alemán" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-el mw-list-item"><a href="https://el.wikipedia.org/wiki/%CE%91%CE%BD%CE%AC%CE%BA%CE%BB%CE%B1%CF%83%CE%B7" title="Ανάκλαση – grego" lang="el" hreflang="el" data-title="Ανάκλαση" data-language-autonym="Ελληνικά" data-language-local-name="grego" class="interlanguage-link-target"><span>Ελληνικά</span></a></li><li class="interlanguage-link interwiki-en mw-list-item"><a href="https://en.wikipedia.org/wiki/Reflection_(physics)" title="Reflection (physics) – inglés" lang="en" hreflang="en" data-title="Reflection (physics)" data-language-autonym="English" data-language-local-name="inglés" class="interlanguage-link-target"><span>English</span></a></li><li class="interlanguage-link interwiki-eo mw-list-item"><a href="https://eo.wikipedia.org/wiki/Reflekto" title="Reflekto – esperanto" lang="eo" hreflang="eo" data-title="Reflekto" data-language-autonym="Esperanto" data-language-local-name="esperanto" class="interlanguage-link-target"><span>Esperanto</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Reflexi%C3%B3n_(f%C3%ADsica)" title="Reflexión (física) – español" lang="es" hreflang="es" data-title="Reflexión (física)" data-language-autonym="Español" data-language-local-name="español" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-et mw-list-item"><a href="https://et.wikipedia.org/wiki/Peegeldumine" title="Peegeldumine – estoniano" lang="et" hreflang="et" data-title="Peegeldumine" data-language-autonym="Eesti" data-language-local-name="estoniano" class="interlanguage-link-target"><span>Eesti</span></a></li><li class="interlanguage-link interwiki-eu mw-list-item"><a href="https://eu.wikipedia.org/wiki/Islapen" title="Islapen – éuscaro" lang="eu" hreflang="eu" data-title="Islapen" data-language-autonym="Euskara" data-language-local-name="éuscaro" class="interlanguage-link-target"><span>Euskara</span></a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/%D8%A8%D8%A7%D8%B2%D8%AA%D8%A7%D8%A8" title="بازتاب – persa" lang="fa" hreflang="fa" data-title="بازتاب" data-language-autonym="فارسی" data-language-local-name="persa" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-fi mw-list-item"><a href="https://fi.wikipedia.org/wiki/Heijastuminen" title="Heijastuminen – finés" lang="fi" hreflang="fi" data-title="Heijastuminen" data-language-autonym="Suomi" data-language-local-name="finés" class="interlanguage-link-target"><span>Suomi</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/R%C3%A9flexion_(physique)" title="Réflexion (physique) – francés" lang="fr" hreflang="fr" data-title="Réflexion (physique)" data-language-autonym="Français" data-language-local-name="francés" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-ga mw-list-item"><a href="https://ga.wikipedia.org/wiki/Frithchaitheamh" title="Frithchaitheamh – irlandés" lang="ga" hreflang="ga" data-title="Frithchaitheamh" data-language-autonym="Gaeilge" data-language-local-name="irlandés" class="interlanguage-link-target"><span>Gaeilge</span></a></li><li class="interlanguage-link interwiki-he mw-list-item"><a href="https://he.wikipedia.org/wiki/%D7%94%D7%97%D7%96%D7%A8%D7%94_(%D7%90%D7%95%D7%A4%D7%98%D7%99%D7%A7%D7%94)" title="החזרה (אופטיקה) – hebreo" lang="he" hreflang="he" data-title="החזרה (אופטיקה)" data-language-autonym="עברית" data-language-local-name="hebreo" class="interlanguage-link-target"><span>עברית</span></a></li><li class="interlanguage-link interwiki-hi mw-list-item"><a href="https://hi.wikipedia.org/wiki/%E0%A4%AA%E0%A4%B0%E0%A4%BE%E0%A4%B5%E0%A4%B0%E0%A5%8D%E0%A4%A4%E0%A4%A8_(%E0%A4%AD%E0%A5%8C%E0%A4%A4%E0%A4%BF%E0%A4%95%E0%A5%80)" title="परावर्तन (भौतिकी) – hindi" lang="hi" hreflang="hi" data-title="परावर्तन (भौतिकी)" data-language-autonym="हिन्दी" data-language-local-name="hindi" class="interlanguage-link-target"><span>हिन्दी</span></a></li><li class="interlanguage-link interwiki-hr mw-list-item"><a href="https://hr.wikipedia.org/wiki/Refleksija" title="Refleksija – croata" lang="hr" hreflang="hr" data-title="Refleksija" data-language-autonym="Hrvatski" data-language-local-name="croata" class="interlanguage-link-target"><span>Hrvatski</span></a></li><li class="interlanguage-link interwiki-hu mw-list-item"><a href="https://hu.wikipedia.org/wiki/F%C3%A9nyvisszaver%C5%91d%C3%A9s" title="Fényvisszaverődés – húngaro" lang="hu" hreflang="hu" data-title="Fényvisszaverődés" data-language-autonym="Magyar" data-language-local-name="húngaro" class="interlanguage-link-target"><span>Magyar</span></a></li><li class="interlanguage-link interwiki-hy mw-list-item"><a href="https://hy.wikipedia.org/wiki/%D4%B1%D5%AC%D5%AB%D6%84%D5%B6%D5%A5%D6%80%D5%AB_%D5%A1%D5%B6%D5%A4%D6%80%D5%A1%D5%A4%D5%A1%D6%80%D5%B1%D5%B8%D6%82%D5%B4_%D6%87_%D5%A2%D5%A5%D5%AF%D5%B8%D6%82%D5%B4" title="Ալիքների անդրադարձում և բեկում – armenio" lang="hy" hreflang="hy" data-title="Ալիքների անդրադարձում և բեկում" data-language-autonym="Հայերեն" data-language-local-name="armenio" class="interlanguage-link-target"><span>Հայերեն</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/Pantulan" title="Pantulan – indonesio" lang="id" hreflang="id" data-title="Pantulan" data-language-autonym="Bahasa Indonesia" data-language-local-name="indonesio" class="interlanguage-link-target"><span>Bahasa Indonesia</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/Riflessione_(fisica)" title="Riflessione (fisica) – italiano" lang="it" hreflang="it" data-title="Riflessione (fisica)" data-language-autonym="Italiano" data-language-local-name="italiano" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/%E5%8F%8D%E5%B0%84" title="反射 – xaponés" lang="ja" hreflang="ja" data-title="反射" data-language-autonym="日本語" data-language-local-name="xaponés" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-kn mw-list-item"><a href="https://kn.wikipedia.org/wiki/%E0%B2%AA%E0%B3%8D%E0%B2%B0%E0%B2%A4%E0%B2%BF%E0%B2%AB%E0%B2%B2%E0%B2%A8" title="ಪ್ರತಿಫಲನ – kannará" lang="kn" hreflang="kn" data-title="ಪ್ರತಿಫಲನ" data-language-autonym="ಕನ್ನಡ" data-language-local-name="kannará" class="interlanguage-link-target"><span>ಕನ್ನಡ</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%EB%B0%98%EC%82%AC" title="반사 – coreano" lang="ko" hreflang="ko" data-title="반사" data-language-autonym="한국어" data-language-local-name="coreano" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-lmo mw-list-item"><a href="https://lmo.wikipedia.org/wiki/Riflession_(fisica)" title="Riflession (fisica) – Lombard" lang="lmo" hreflang="lmo" data-title="Riflession (fisica)" data-language-autonym="Lombard" data-language-local-name="Lombard" class="interlanguage-link-target"><span>Lombard</span></a></li><li class="interlanguage-link interwiki-lo mw-list-item"><a href="https://lo.wikipedia.org/wiki/%E0%BA%81%E0%BA%B2%E0%BA%99%E0%BA%AA%E0%BA%B0%E0%BA%97%E0%BB%89%E0%BA%AD%E0%BA%99_(%E0%BA%9F%E0%BA%B5%E0%BA%8A%E0%BA%B4%E0%BA%81)" title="ການສະທ້ອນ (ຟີຊິກ) – laosiano" lang="lo" hreflang="lo" data-title="ການສະທ້ອນ (ຟີຊິກ)" data-language-autonym="ລາວ" data-language-local-name="laosiano" class="interlanguage-link-target"><span>ລາວ</span></a></li><li class="interlanguage-link interwiki-lt mw-list-item"><a href="https://lt.wikipedia.org/wiki/Atspindys" title="Atspindys – lituano" lang="lt" hreflang="lt" data-title="Atspindys" data-language-autonym="Lietuvių" data-language-local-name="lituano" class="interlanguage-link-target"><span>Lietuvių</span></a></li><li class="interlanguage-link interwiki-lv mw-list-item"><a href="https://lv.wikipedia.org/wiki/Atstaro%C5%A1ana" title="Atstarošana – letón" lang="lv" hreflang="lv" data-title="Atstarošana" data-language-autonym="Latviešu" data-language-local-name="letón" class="interlanguage-link-target"><span>Latviešu</span></a></li><li class="interlanguage-link interwiki-mk mw-list-item"><a href="https://mk.wikipedia.org/wiki/%D0%9E%D0%B4%D0%B1%D0%B8%D0%B2%D0%B0%D1%9A%D0%B5_(%D1%84%D0%B8%D0%B7%D0%B8%D0%BA%D0%B0)" title="Одбивање (физика) – macedonio" lang="mk" hreflang="mk" data-title="Одбивање (физика)" data-language-autonym="Македонски" data-language-local-name="macedonio" class="interlanguage-link-target"><span>Македонски</span></a></li><li class="interlanguage-link interwiki-ml mw-list-item"><a href="https://ml.wikipedia.org/wiki/%E0%B4%AA%E0%B5%8D%E0%B4%B0%E0%B4%A4%E0%B4%BF%E0%B4%AB%E0%B4%B2%E0%B4%A8%E0%B4%82" title="പ്രതിഫലനം – malabar" lang="ml" hreflang="ml" data-title="പ്രതിഫലനം" data-language-autonym="മലയാളം" data-language-local-name="malabar" class="interlanguage-link-target"><span>മലയാളം</span></a></li><li class="interlanguage-link interwiki-mr mw-list-item"><a href="https://mr.wikipedia.org/wiki/%E0%A4%AA%E0%A4%B0%E0%A4%BE%E0%A4%B5%E0%A4%B0%E0%A5%8D%E0%A4%A4%E0%A4%A8" title="परावर्तन – marathi" lang="mr" hreflang="mr" data-title="परावर्तन" data-language-autonym="मराठी" data-language-local-name="marathi" class="interlanguage-link-target"><span>मराठी</span></a></li><li class="interlanguage-link interwiki-ms mw-list-item"><a href="https://ms.wikipedia.org/wiki/Pantulan_(fizik)" title="Pantulan (fizik) – malaio" lang="ms" hreflang="ms" data-title="Pantulan (fizik)" data-language-autonym="Bahasa Melayu" data-language-local-name="malaio" class="interlanguage-link-target"><span>Bahasa Melayu</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/Reflectie_(straling)" title="Reflectie (straling) – neerlandés" lang="nl" hreflang="nl" data-title="Reflectie (straling)" data-language-autonym="Nederlands" data-language-local-name="neerlandés" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-nn mw-list-item"><a href="https://nn.wikipedia.org/wiki/Refleksjon" title="Refleksjon – noruegués nynorsk" lang="nn" hreflang="nn" data-title="Refleksjon" data-language-autonym="Norsk nynorsk" data-language-local-name="noruegués nynorsk" class="interlanguage-link-target"><span>Norsk nynorsk</span></a></li><li class="interlanguage-link interwiki-no mw-list-item"><a href="https://no.wikipedia.org/wiki/Refleksjon_(fysikk)" title="Refleksjon (fysikk) – noruegués bokmål" lang="nb" hreflang="nb" data-title="Refleksjon (fysikk)" data-language-autonym="Norsk bokmål" data-language-local-name="noruegués bokmål" class="interlanguage-link-target"><span>Norsk bokmål</span></a></li><li class="interlanguage-link interwiki-om mw-list-item"><a href="https://om.wikipedia.org/wiki/Balaqqeessa%E2%80%99uu_ifaa" title="Balaqqeessa’uu ifaa – oromo" lang="om" hreflang="om" data-title="Balaqqeessa’uu ifaa" data-language-autonym="Oromoo" data-language-local-name="oromo" class="interlanguage-link-target"><span>Oromoo</span></a></li><li class="interlanguage-link interwiki-pa mw-list-item"><a href="https://pa.wikipedia.org/wiki/%E0%A8%9D%E0%A8%B2%E0%A8%95%E0%A8%BE%E0%A8%B0%E0%A8%BE" title="ਝਲਕਾਰਾ – panxabí" lang="pa" hreflang="pa" data-title="ਝਲਕਾਰਾ" data-language-autonym="ਪੰਜਾਬੀ" data-language-local-name="panxabí" class="interlanguage-link-target"><span>ਪੰਜਾਬੀ</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Odbicie_fali" title="Odbicie fali – polaco" lang="pl" hreflang="pl" data-title="Odbicie fali" data-language-autonym="Polski" data-language-local-name="polaco" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-pms mw-list-item"><a href="https://pms.wikipedia.org/wiki/Arflession" title="Arflession – Piedmontese" lang="pms" hreflang="pms" data-title="Arflession" data-language-autonym="Piemontèis" data-language-local-name="Piedmontese" class="interlanguage-link-target"><span>Piemontèis</span></a></li><li class="interlanguage-link interwiki-pnb mw-list-item"><a href="https://pnb.wikipedia.org/wiki/%D8%AC%DA%BE%D9%84%DA%A9%D8%A7%D8%B1%DB%81" title="جھلکارہ – Western Punjabi" lang="pnb" hreflang="pnb" data-title="جھلکارہ" data-language-autonym="پنجابی" data-language-local-name="Western Punjabi" class="interlanguage-link-target"><span>پنجابی</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/Reflex%C3%A3o_(f%C3%ADsica)" title="Reflexão (física) – portugués" lang="pt" hreflang="pt" data-title="Reflexão (física)" data-language-autonym="Português" data-language-local-name="portugués" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-ro mw-list-item"><a href="https://ro.wikipedia.org/wiki/Reflexia_luminii" title="Reflexia luminii – romanés" lang="ro" hreflang="ro" data-title="Reflexia luminii" data-language-autonym="Română" data-language-local-name="romanés" class="interlanguage-link-target"><span>Română</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/%D0%9E%D1%82%D1%80%D0%B0%D0%B6%D0%B5%D0%BD%D0%B8%D0%B5_(%D1%84%D0%B8%D0%B7%D0%B8%D0%BA%D0%B0)" title="Отражение (физика) – ruso" lang="ru" hreflang="ru" data-title="Отражение (физика)" data-language-autonym="Русский" data-language-local-name="ruso" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-sa mw-list-item"><a href="https://sa.wikipedia.org/wiki/%E0%A4%AA%E0%A4%B0%E0%A4%BE%E0%A4%B5%E0%A4%B0%E0%A5%8D%E0%A4%A4%E0%A4%A8%E0%A4%AE%E0%A5%8D_(%E0%A4%AD%E0%A5%8C%E0%A4%A4%E0%A4%B5%E0%A4%BF%E0%A4%9C%E0%A5%8D%E0%A4%9E%E0%A4%BE%E0%A4%A8%E0%A4%AE%E0%A5%8D)" title="परावर्तनम् (भौतविज्ञानम्) – sánscrito" lang="sa" hreflang="sa" data-title="परावर्तनम् (भौतविज्ञानम्)" data-language-autonym="संस्कृतम्" data-language-local-name="sánscrito" class="interlanguage-link-target"><span>संस्कृतम्</span></a></li><li class="interlanguage-link interwiki-sd mw-list-item"><a href="https://sd.wikipedia.org/wiki/%D8%A7%D9%88%D9%84%DA%99%D9%88" title="اولڙو – sindhi" lang="sd" hreflang="sd" data-title="اولڙو" data-language-autonym="سنڌي" data-language-local-name="sindhi" class="interlanguage-link-target"><span>سنڌي</span></a></li><li class="interlanguage-link interwiki-sh mw-list-item"><a href="https://sh.wikipedia.org/wiki/Odraz" title="Odraz – serbocroata" lang="sh" hreflang="sh" data-title="Odraz" data-language-autonym="Srpskohrvatski / српскохрватски" data-language-local-name="serbocroata" class="interlanguage-link-target"><span>Srpskohrvatski / српскохрватски</span></a></li><li class="interlanguage-link interwiki-si mw-list-item"><a href="https://si.wikipedia.org/wiki/%E0%B6%86%E0%B6%BD%E0%B7%9D%E0%B6%9A_%E0%B6%B4%E0%B6%BB%E0%B7%8F%E0%B7%80%E0%B6%BB%E0%B7%8A%E0%B6%AD%E0%B6%B1%E0%B6%BA" title="ආලෝක පරාවර්තනය – cingalés" lang="si" hreflang="si" data-title="ආලෝක පරාවර්තනය" data-language-autonym="සිංහල" data-language-local-name="cingalés" class="interlanguage-link-target"><span>සිංහල</span></a></li><li class="interlanguage-link interwiki-simple mw-list-item"><a href="https://simple.wikipedia.org/wiki/Reflection" title="Reflection – Simple English" lang="en-simple" hreflang="en-simple" data-title="Reflection" data-language-autonym="Simple English" data-language-local-name="Simple English" class="interlanguage-link-target"><span>Simple English</span></a></li><li class="interlanguage-link interwiki-sk mw-list-item"><a href="https://sk.wikipedia.org/wiki/Odraz_vlnenia" title="Odraz vlnenia – eslovaco" lang="sk" hreflang="sk" data-title="Odraz vlnenia" data-language-autonym="Slovenčina" data-language-local-name="eslovaco" class="interlanguage-link-target"><span>Slovenčina</span></a></li><li class="interlanguage-link interwiki-sl mw-list-item"><a href="https://sl.wikipedia.org/wiki/Odboj" title="Odboj – esloveno" lang="sl" hreflang="sl" data-title="Odboj" data-language-autonym="Slovenščina" data-language-local-name="esloveno" class="interlanguage-link-target"><span>Slovenščina</span></a></li><li class="interlanguage-link interwiki-so mw-list-item"><a href="https://so.wikipedia.org/wiki/Hummaag_noqod" title="Hummaag noqod – somalí" lang="so" hreflang="so" data-title="Hummaag noqod" data-language-autonym="Soomaaliga" data-language-local-name="somalí" class="interlanguage-link-target"><span>Soomaaliga</span></a></li><li class="interlanguage-link interwiki-sq mw-list-item"><a href="https://sq.wikipedia.org/wiki/Reflektimi" title="Reflektimi – albanés" lang="sq" hreflang="sq" data-title="Reflektimi" data-language-autonym="Shqip" data-language-local-name="albanés" class="interlanguage-link-target"><span>Shqip</span></a></li><li class="interlanguage-link interwiki-sr mw-list-item"><a href="https://sr.wikipedia.org/wiki/%D0%A0%D0%B5%D1%84%D0%BB%D0%B5%D0%BA%D1%81%D0%B8%D1%98%D0%B0" title="Рефлексија – serbio" lang="sr" hreflang="sr" data-title="Рефлексија" data-language-autonym="Српски / srpski" data-language-local-name="serbio" class="interlanguage-link-target"><span>Српски / srpski</span></a></li><li class="interlanguage-link interwiki-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/Reflexion_(fysik)" title="Reflexion (fysik) – sueco" lang="sv" hreflang="sv" data-title="Reflexion (fysik)" data-language-autonym="Svenska" data-language-local-name="sueco" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-ta mw-list-item"><a href="https://ta.wikipedia.org/wiki/%E0%AE%8E%E0%AE%A4%E0%AE%BF%E0%AE%B0%E0%AF%8A%E0%AE%B3%E0%AE%BF%E0%AE%AA%E0%AF%8D%E0%AE%AA%E0%AF%81" title="எதிரொளிப்பு – támil" lang="ta" hreflang="ta" data-title="எதிரொளிப்பு" data-language-autonym="தமிழ்" data-language-local-name="támil" class="interlanguage-link-target"><span>தமிழ்</span></a></li><li class="interlanguage-link interwiki-te mw-list-item"><a href="https://te.wikipedia.org/wiki/%E0%B0%AA%E0%B0%B0%E0%B0%BE%E0%B0%B5%E0%B0%B0%E0%B1%8D%E0%B0%A4%E0%B0%A8%E0%B0%82" title="పరావర్తనం – telugu" lang="te" hreflang="te" data-title="పరావర్తనం" data-language-autonym="తెలుగు" data-language-local-name="telugu" class="interlanguage-link-target"><span>తెలుగు</span></a></li><li class="interlanguage-link interwiki-th mw-list-item"><a href="https://th.wikipedia.org/wiki/%E0%B8%81%E0%B8%B2%E0%B8%A3%E0%B8%AA%E0%B8%B0%E0%B8%97%E0%B9%89%E0%B8%AD%E0%B8%99_(%E0%B8%9F%E0%B8%B4%E0%B8%AA%E0%B8%B4%E0%B8%81%E0%B8%AA%E0%B9%8C)" title="การสะท้อน (ฟิสิกส์) – tailandés" lang="th" hreflang="th" data-title="การสะท้อน (ฟิสิกส์)" data-language-autonym="ไทย" data-language-local-name="tailandés" class="interlanguage-link-target"><span>ไทย</span></a></li><li class="interlanguage-link interwiki-tl mw-list-item"><a href="https://tl.wikipedia.org/wiki/Repleksyon_(pisika)" title="Repleksyon (pisika) – tagalo" lang="tl" hreflang="tl" data-title="Repleksyon (pisika)" data-language-autonym="Tagalog" data-language-local-name="tagalo" class="interlanguage-link-target"><span>Tagalog</span></a></li><li class="interlanguage-link interwiki-tr mw-list-item"><a href="https://tr.wikipedia.org/wiki/Yans%C4%B1ma" title="Yansıma – turco" lang="tr" hreflang="tr" data-title="Yansıma" data-language-autonym="Türkçe" data-language-local-name="turco" class="interlanguage-link-target"><span>Türkçe</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/%D0%92%D1%96%D0%B4%D0%B1%D0%B8%D1%82%D1%82%D1%8F_(%D1%84%D1%96%D0%B7%D0%B8%D0%BA%D0%B0)" title="Відбиття (фізика) – ucraíno" lang="uk" hreflang="uk" data-title="Відбиття (фізика)" data-language-autonym="Українська" data-language-local-name="ucraíno" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-ur mw-list-item"><a href="https://ur.wikipedia.org/wiki/%D8%A7%D9%86%D8%B9%DA%A9%D8%A7%D8%B3" title="انعکاس – urdú" lang="ur" hreflang="ur" data-title="انعکاس" data-language-autonym="اردو" data-language-local-name="urdú" class="interlanguage-link-target"><span>اردو</span></a></li><li class="interlanguage-link interwiki-vec mw-list-item"><a href="https://vec.wikipedia.org/wiki/Refresion" title="Refresion – Venetian" lang="vec" hreflang="vec" data-title="Refresion" data-language-autonym="Vèneto" data-language-local-name="Venetian" class="interlanguage-link-target"><span>Vèneto</span></a></li><li class="interlanguage-link interwiki-vi mw-list-item"><a href="https://vi.wikipedia.org/wiki/Ph%E1%BA%A3n_x%E1%BA%A1" title="Phản xạ – vietnamita" lang="vi" hreflang="vi" data-title="Phản xạ" data-language-autonym="Tiếng Việt" data-language-local-name="vietnamita" class="interlanguage-link-target"><span>Tiếng Việt</span></a></li><li class="interlanguage-link interwiki-wuu mw-list-item"><a href="https://wuu.wikipedia.org/wiki/%E5%85%89%E4%B8%AA%E5%8F%8D%E5%B0%84" title="光个反射 – chinés wu" lang="wuu" hreflang="wuu" data-title="光个反射" data-language-autonym="吴语" data-language-local-name="chinés wu" class="interlanguage-link-target"><span>吴语</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/%E5%8F%8D%E5%B0%84_(%E7%89%A9%E7%90%86%E5%AD%A6)" title="反射 (物理学) – chinés" lang="zh" hreflang="zh" data-title="反射 (物理学)" data-language-autonym="中文" data-language-local-name="chinés" class="interlanguage-link-target"><span>中文</span></a></li><li class="interlanguage-link interwiki-zh-classical mw-list-item"><a href="https://zh-classical.wikipedia.org/wiki/%E5%8F%8D%E5%B0%84" title="反射 – Literary Chinese" lang="lzh" hreflang="lzh" data-title="反射" data-language-autonym="文言" data-language-local-name="Literary Chinese" class="interlanguage-link-target"><span>文言</span></a></li><li class="interlanguage-link interwiki-zh-min-nan mw-list-item"><a href="https://zh-min-nan.wikipedia.org/wiki/Ho%C3%A1n-si%C4%81" title="Hoán-siā – Minnan" lang="nan" hreflang="nan" data-title="Hoán-siā" data-language-autonym="閩南語 / Bân-lâm-gú" data-language-local-name="Minnan" class="interlanguage-link-target"><span>閩南語 / Bân-lâm-gú</span></a></li><li class="interlanguage-link interwiki-zh-yue mw-list-item"><a href="https://zh-yue.wikipedia.org/wiki/%E5%8F%8D%E5%B0%84" title="反射 – cantonés" lang="yue" hreflang="yue" data-title="反射" data-language-autonym="粵語" data-language-local-name="cantonés" class="interlanguage-link-target"><span>粵語</span></a></li><li class="interlanguage-link interwiki-zu mw-list-item"><a href="https://zu.wikipedia.org/wiki/Ukukhwentuza_(kumchazandalo)" title="Ukukhwentuza (kumchazandalo) – zulú" lang="zu" hreflang="zu" data-title="Ukukhwentuza (kumchazandalo)" data-language-autonym="IsiZulu" data-language-local-name="zulú" class="interlanguage-link-target"><span>IsiZulu</span></a></li> </ul> <div class="after-portlet after-portlet-lang"><span class="wb-langlinks-edit wb-langlinks-link"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q165939#sitelinks-wikipedia" title="Editar as ligazóns interlingüísticas" class="wbc-editpage">Editar as ligazóns</a></span></div> </div> </div> </div> </header> <div class="vector-page-toolbar"> <div class="vector-page-toolbar-container"> <div id="left-navigation"> <nav aria-label="Espazos de nomes"> <div id="p-associated-pages" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-associated-pages" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-nstab-main" class="selected vector-tab-noicon mw-list-item"><a href="/wiki/Reflexi%C3%B3n_(f%C3%ADsica)" title="Ver o contido da páxina [c]" accesskey="c"><span>Artigo</span></a></li><li id="ca-talk" class="vector-tab-noicon mw-list-item"><a href="/wiki/Conversa:Reflexi%C3%B3n_(f%C3%ADsica)" rel="discussion" title="Conversa acerca do contido desta páxina [t]" accesskey="t"><span>Conversa</span></a></li> </ul> </div> </div> <div id="vector-variants-dropdown" class="vector-dropdown emptyPortlet" > <input type="checkbox" id="vector-variants-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-variants-dropdown" class="vector-dropdown-checkbox " aria-label="Cambiar a variante de lingua" > <label id="vector-variants-dropdown-label" 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title="Editar esta páxina [v]" accesskey="v"><span>Editar</span></a></li><li id="ca-edit" class="collapsible vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Reflexi%C3%B3n_(f%C3%ADsica)&action=edit" title="Editar o código fonte desta páxina [e]" accesskey="e"><span>Editar a fonte</span></a></li><li id="ca-history" class="vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Reflexi%C3%B3n_(f%C3%ADsica)&action=history" title="Versións anteriores desta páxina [h]" accesskey="h"><span>Ver o historial</span></a></li> </ul> </div> </div> </nav> <nav class="vector-page-tools-landmark" aria-label="Ferramentas das páxinas"> <div id="vector-page-tools-dropdown" class="vector-dropdown vector-page-tools-dropdown" > <input type="checkbox" id="vector-page-tools-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-tools-dropdown" class="vector-dropdown-checkbox " aria-label="Ferramentas" > <label id="vector-page-tools-dropdown-label" 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<button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-appearance.pin">mover á barra lateral</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-appearance.unpin">agochar</button> </div> </div> </div> </nav> </div> </div> <div id="bodyContent" class="vector-body" aria-labelledby="firstHeading" data-mw-ve-target-container> <div class="vector-body-before-content"> <div class="mw-indicators"> </div> <div id="siteSub" class="noprint">Na Galipedia, a Wikipedia en galego.</div> </div> <div id="contentSub"><div id="mw-content-subtitle"></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="gl" dir="ltr"><figure class="mw-default-size mw-halign-right" typeof="mw:File/Thumb"><a href="/wiki/Ficheiro:Reflexao.png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/d/dc/Reflexao.png/220px-Reflexao.png" decoding="async" width="220" height="129" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/d/dc/Reflexao.png/330px-Reflexao.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/d/dc/Reflexao.png/440px-Reflexao.png 2x" data-file-width="600" data-file-height="351" /></a><figcaption>Diagrama simple ilustrando o fenómeno da reflexión.</figcaption></figure> <p>En <a href="/wiki/F%C3%ADsica" title="Física">física</a> o fenómeno da <b>reflexión</b> consiste na mudanza da dirección de propagación da enerxía . Consiste no retorno da enerxía incidente en dirección á rexión de onde procede, despois de entrar en contacto cunha superficie reflectora. </p><p>A enerxía pode tanto estar manifestada na forma de <a href="/wiki/Onda_(f%C3%ADsica)" title="Onda (física)">ondas</a> como transmitida a través de <a href="/wiki/Part%C3%ADcula_subat%C3%B3mica" title="Partícula subatómica">partículas</a>. Por iso, a reflexión é un fenómeno que se pode dar por un carácter <a href="/wiki/Electromagnetismo" title="Electromagnetismo">electromagnético</a>, <a href="/wiki/%C3%93ptica" title="Óptica">óptico</a> ou <a href="/wiki/Son" title="Son">sonoro</a>. </p><p>A reflexión difire da <a href="/wiki/Refracci%C3%B3n" title="Refracción">refracción</a> porque nesta segunda hai desvío da enerxía para un medio distinto do medio de onde se orixinou. </p> <div class="mw-heading mw-heading2"><h2 id="Leis_da_reflexión"><span id="Leis_da_reflexi.C3.B3n"></span>Leis da reflexión</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Reflexi%C3%B3n_(f%C3%ADsica)&veaction=edit&section=1" title="Editar a sección: «Leis da reflexión»" class="mw-editsection-visualeditor"><span>editar</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Reflexi%C3%B3n_(f%C3%ADsica)&action=edit&section=1" title="Editar o código fonte da sección: Leis da reflexión"><span>editar a fonte</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>A reflexión pode explicarse totalmente con base a dúas leis, de cuño xeral. </p><p>Para enuncialas, é preciso antes definir algúns conceptos. </p> <ul><li>A <i>normal</i> é a semi-recta que se orixina a partir da superficie reflectora, situándose perpendicularmente a esta</li> <li><i>Ángulo de incidencia</i> é o ángulo que a dirección de movemento da enerxía fai coa normal</li> <li><i>Ángulo de reflexión</i> é o ángulo que a dirección que a enerxía que é reflectida fai coa normal</li></ul> <p>Así, as dúas leis da reflexión poden ser expresas da seguinte maneira: </p> <ol><li><b>A dirección da enerxía incidente, a normal e a dirección da enerxía emerxente pertencen a un único plano.</b></li> <li><b>O ángulo de incidencia ten valor igual ao valor do ángulo de reflexión.</b></li></ol> <div class="mw-heading mw-heading2"><h2 id="Explicación_teórica"><span id="Explicaci.C3.B3n_te.C3.B3rica"></span>Explicación teórica</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Reflexi%C3%B3n_(f%C3%ADsica)&veaction=edit&section=2" title="Editar a sección: «Explicación teórica»" class="mw-editsection-visualeditor"><span>editar</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Reflexi%C3%B3n_(f%C3%ADsica)&action=edit&section=2" title="Editar o código fonte da sección: Explicación teórica"><span>editar a fonte</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Sendo un fenómeno que atopa exemplos tanto en física ondulatoria como na física de corpos materiais, é natural desconfiar que teña unha explicación común aos dous tipos de comportamento. </p><p>Historicamente, o primeiro en formular unha explicación para a reflexión (especificamente, a da luz) foi <a href="/wiki/Her%C3%B3n_de_Alexandr%C3%ADa" title="Herón de Alexandría">Herón de Alexandría</a>. Utilizándo o principio aristotélico que di que a natureza nada fai de modo máis difícil, argumentou que a luz percorre o <b>menor camiño entre dous puntos calquera</b>. Ora, se se obrigase á luz a desviarse durante o percorrido, aínda así percorre o menor camiño entre a fonte e o branco. A ese principio de óptica xeométrica damos o nome de <a href="/w/index.php?title=Principio_de_Heron&action=edit&redlink=1" class="new" title="Principio de Heron (a páxina aínda non existe)">principio de Heron</a>. </p><p>Moito máis tarde <a href="/wiki/Pierre_de_Fermat" title="Pierre de Fermat">Fermat</a> enunciou outro principio semellante. Porén asinalaba que o tempo era mínimo e non a distancia percorrida. Ese principio coñécese como <a href="/wiki/Principio_de_Fermat" title="Principio de Fermat">principio de Fermat</a>. </p><p>Aínda máis tarde, <a href="/w/index.php?title=Pierre-Louis_Moreau_de_Maupertuis&action=edit&redlink=1" class="new" title="Pierre-Louis Moreau de Maupertuis (a páxina aínda non existe)">Maupertuis</a> formulou pola primeira vez o <a href="/w/index.php?title=Pricipio_da_menor_acci%C3%B3n&action=edit&redlink=1" class="new" title="Pricipio da menor acción (a páxina aínda non existe)">principio da menor acción</a>, onde entón xorde a noción de <a href="/w/index.php?title=Acci%C3%B3n_(f%C3%ADsica)&action=edit&redlink=1" class="new" title="Acción (física) (a páxina aínda non existe)">acción</a>. Entre tanto, dentro do punto de vista do <a href="/wiki/C%C3%A1lculo_das_variaci%C3%B3ns" class="mw-redirect" title="Cálculo das variacións">cálculo das variacións</a>, mellor sería chamar ese principio de <b>principio da acción estacionaria</b>, xa que na verdade a condición é de se achar un <a href="/w/index.php?title=Extremante&action=edit&redlink=1" class="new" title="Extremante (a páxina aínda non existe)">extremante</a> para a <a href="/w/index.php?title=Funcional&action=edit&redlink=1" class="new" title="Funcional (a páxina aínda non existe)">funcional</a> <a href="/w/index.php?title=Acci%C3%B3n_(f%C3%ADsica)&action=edit&redlink=1" class="new" title="Acción (física) (a páxina aínda non existe)">acción</a>. </p><p>Máis tarde, sir <a href="/wiki/William_Rowan_Hamilton" class="mw-redirect" title="William Rowan Hamilton">Hamilton</a> enunciou a forma moderna do <a href="/w/index.php?title=Principio_variacional&action=edit&redlink=1" class="new" title="Principio variacional (a páxina aínda non existe)">principio variacional</a>. </p> <div class="mw-heading mw-heading2"><h2 id="Utilización"><span id="Utilizaci.C3.B3n"></span>Utilización</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Reflexi%C3%B3n_(f%C3%ADsica)&veaction=edit&section=3" title="Editar a sección: «Utilización»" class="mw-editsection-visualeditor"><span>editar</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Reflexi%C3%B3n_(f%C3%ADsica)&action=edit&section=3" title="Editar o código fonte da sección: Utilización"><span>editar a fonte</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>A reflexión luminosa é a base da construción e utilización dos <a href="/wiki/Espello" title="Espello">espellos</a>. </p><p>Os espellos, tanto planos canto os esféricos, son a base dos <a href="/wiki/Telescopio" title="Telescopio">telescopios</a> <i>reflectores</i>, que sofren de menos restricións que os telescopios <i>refratores</i>. </p> <hr /> <table> <tbody><tr> <td><span typeof="mw:File"><span title="Este artigo tan só é un bosquexo"><img alt="Este artigo tan só é un bosquexo" src="//upload.wikimedia.org/wikipedia/commons/thumb/c/cc/Logo_physics.svg/30px-Logo_physics.svg.png" decoding="async" width="30" height="30" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/c/cc/Logo_physics.svg/45px-Logo_physics.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/c/cc/Logo_physics.svg/60px-Logo_physics.svg.png 2x" data-file-width="438" data-file-height="438" /></span></span> </td> <td><div style="line-height: 110%;"> <span style="font-size:95%"><i>Este artigo sobre <a href="/wiki/F%C3%ADsica" title="Física">física</a> é, polo de agora, só un bosquexo. <span class="plainlinks"><a class="external text" href="https://gl.wikipedia.org/w/index.php?title=Reflexi%C3%B3n_(f%C3%ADsica)&action=edit">Traballa nel</a></span> para axudar a contribuír a que a Galipedia <a href="/wiki/Wikipedia:Mantemento" title="Wikipedia:Mantemento">mellore e medre</a>.</i></span><br /> <i><span style="font-size:85%">Existen igualmente outros <a href="/wiki/Categor%C3%ADa:Wikipedia:F%C3%ADsica_en_progreso" title="Categoría:Wikipedia:Física en progreso">artigos relacionados con este tema</a> nos que tamén podes contribuír.</span></i></div> </td></tr></tbody></table> <hr /> <div role="navigation" class="navbox" aria-labelledby="Control_de_autoridades" style="padding:3px"><table class="nowraplinks hlist navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th id="Control_de_autoridades" scope="row" class="navbox-group" style="width:1%;width: 12%; 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