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[r]" accesskey="r"><span>Nýlegar breytingar</span></a></li><li id="n-newpages" class="mw-list-item"><a href="/wiki/Kerfiss%C3%AD%C3%B0a:N%C3%BDjustu_greinar"><span>Nýjustu greinar</span></a></li><li id="n-portal" class="mw-list-item"><a href="/wiki/Wikipedia:Samf%C3%A9lagsg%C3%A1tt" title="Um verkefnið, hvernig er hægt að hjálpa og hvar á að byrja"><span>Samfélagsgátt</span></a></li><li id="n-Potturinn" class="mw-list-item"><a href="/wiki/Wikipedia:Potturinn"><span>Potturinn</span></a></li> </ul> </div> </div> </div> </div> </div> </div> </nav> <a href="/wiki/Fors%C3%AD%C3%B0a" class="mw-logo"> <img class="mw-logo-icon" src="/static/images/icons/wikipedia.png" alt="" aria-hidden="true" height="50" width="50"> <span class="mw-logo-container skin-invert"> <img class="mw-logo-wordmark" alt="Wikipedia" src="/static/images/mobile/copyright/wikipedia-wordmark-en.svg" style="width: 7.5em; height: 1.125em;"> <img class="mw-logo-tagline" alt="Frjálsa alfræðiritið" src="/static/images/mobile/copyright/wikipedia-tagline-is.svg" width="118" height="12" style="width: 7.375em; 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[o]" accesskey="o" class=""><span>Skrá inn</span></a> </li> </ul> </div> </div> </div> <div id="vector-user-links-dropdown" class="vector-dropdown vector-user-menu vector-button-flush-right vector-user-menu-logged-out" title="Frekari valkostir" > <input type="checkbox" id="vector-user-links-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-user-links-dropdown" class="vector-dropdown-checkbox " aria-label="Persónuleg verkfæri" > <label id="vector-user-links-dropdown-label" for="vector-user-links-dropdown-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-ellipsis mw-ui-icon-wikimedia-ellipsis"></span> <span class="vector-dropdown-label-text">Persónuleg verkfæri</span> </label> <div class="vector-dropdown-content"> <div id="p-personal" class="vector-menu mw-portlet mw-portlet-personal user-links-collapsible-item" title="Notandavalmynd" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-sitesupport" class="user-links-collapsible-item mw-list-item"><a href="//donate.wikimedia.org/wiki/Special:FundraiserRedirector?utm_source=donate&utm_medium=sidebar&utm_campaign=C13_is.wikipedia.org&uselang=is"><span>Fjárframlög</span></a></li><li id="pt-createaccount" class="user-links-collapsible-item mw-list-item"><a href="/w/index.php?title=Kerfiss%C3%AD%C3%B0a:B%C3%BAa_til_a%C3%B0gang&returnto=Lj%C3%B3sefnafr%C3%A6%C3%B0i" title="Þú ert hvattur/hvött til að búa til aðgang og skrá þig inn; en það er ekki skylda"><span class="vector-icon mw-ui-icon-userAdd mw-ui-icon-wikimedia-userAdd"></span> <span>Búa til aðgang</span></a></li><li id="pt-login" class="user-links-collapsible-item mw-list-item"><a href="/w/index.php?title=Kerfiss%C3%AD%C3%B0a:Innskr%C3%A1&returnto=Lj%C3%B3sefnafr%C3%A6%C3%B0i" title="Þú ert hvattur/hvött til að innskrá þig, það er hinsvegar ekki skylda. [o]" accesskey="o"><span class="vector-icon mw-ui-icon-logIn mw-ui-icon-wikimedia-logIn"></span> <span>Skrá inn</span></a></li> </ul> </div> </div> <div id="p-user-menu-anon-editor" class="vector-menu mw-portlet mw-portlet-user-menu-anon-editor" > <div class="vector-menu-heading"> Síður fyrir útskráða notendur <a href="/wiki/Hj%C3%A1lp:Introduction" aria-label="Læra meira um breytingar"><span>Læra meira</span></a> </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-anoncontribs" class="mw-list-item"><a href="/wiki/Kerfiss%C3%AD%C3%B0a:Framl%C3%B6g_m%C3%ADn" title="Listi yfir breytingar frá þessu IP-staðfangi [y]" accesskey="y"><span>Framlög</span></a></li><li id="pt-anontalk" class="mw-list-item"><a href="/wiki/Kerfiss%C3%AD%C3%B0a:Spjallas%C3%AD%C3%B0a_m%C3%ADn" title="Spjall um breytingar frá þessu IP-staðfangi [n]" accesskey="n"><span>Spjall</span></a></li> </ul> </div> </div> </div> </div> </nav> </div> </header> </div> <div class="mw-page-container"> <div class="mw-page-container-inner"> <div class="vector-sitenotice-container"> <div id="siteNotice"></div> </div> <div class="vector-column-start"> <div class="vector-main-menu-container"> <div id="mw-navigation"> <nav id="mw-panel" class="vector-main-menu-landmark" aria-label="Vefsíða"> <div id="vector-main-menu-pinned-container" class="vector-pinned-container"> </div> </nav> </div> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">Ljósefnafræði</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="Fara á grein á öðru tungumáli. Til staðar á 63 tungumálum" > <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-63" 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">63 tungumál</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/Fotochemie" title="Fotochemie – afríkanska" lang="af" hreflang="af" data-title="Fotochemie" data-language-autonym="Afrikaans" data-language-local-name="afríkanska" class="interlanguage-link-target"><span>Afrikaans</span></a></li><li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D9%83%D9%8A%D9%85%D9%8A%D8%A7%D8%A1_%D8%B6%D9%88%D8%A6%D9%8A%D8%A9" title="كيمياء ضوئية – arabíska" lang="ar" hreflang="ar" data-title="كيمياء ضوئية" data-language-autonym="العربية" data-language-local-name="arabíska" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-ast mw-list-item"><a href="https://ast.wikipedia.org/wiki/Fotoqu%C3%ADmica" title="Fotoquímica – astúríska" lang="ast" hreflang="ast" data-title="Fotoquímica" data-language-autonym="Asturianu" data-language-local-name="astúríska" class="interlanguage-link-target"><span>Asturianu</span></a></li><li class="interlanguage-link interwiki-az mw-list-item"><a href="https://az.wikipedia.org/wiki/Fotokimya" title="Fotokimya – aserska" lang="az" hreflang="az" data-title="Fotokimya" data-language-autonym="Azərbaycanca" data-language-local-name="aserska" class="interlanguage-link-target"><span>Azərbaycanca</span></a></li><li class="interlanguage-link interwiki-azb mw-list-item"><a href="https://azb.wikipedia.org/wiki/%D9%81%D9%88%D8%AA%D9%88%D8%B4%DB%8C%D9%85%DB%8C" title="فوتوشیمی – South Azerbaijani" lang="azb" hreflang="azb" data-title="فوتوشیمی" data-language-autonym="تۆرکجه" data-language-local-name="South Azerbaijani" class="interlanguage-link-target"><span>تۆرکجه</span></a></li><li class="interlanguage-link interwiki-ba mw-list-item"><a href="https://ba.wikipedia.org/wiki/%D0%A4%D0%BE%D1%82%D0%BE%D1%85%D0%B8%D0%BC%D0%B8%D1%8F" title="Фотохимия – baskír" lang="ba" hreflang="ba" data-title="Фотохимия" data-language-autonym="Башҡортса" data-language-local-name="baskír" class="interlanguage-link-target"><span>Башҡортса</span></a></li><li class="interlanguage-link interwiki-be mw-list-item"><a href="https://be.wikipedia.org/wiki/%D0%A4%D0%BE%D1%82%D0%B0%D1%85%D1%96%D0%BC%D1%96%D1%8F" title="Фотахімія – hvítrússneska" lang="be" hreflang="be" data-title="Фотахімія" data-language-autonym="Беларуская" data-language-local-name="hvítrússneska" class="interlanguage-link-target"><span>Беларуская</span></a></li><li class="interlanguage-link interwiki-bg mw-list-item"><a href="https://bg.wikipedia.org/wiki/%D0%A4%D0%BE%D1%82%D0%BE%D1%85%D0%B8%D0%BC%D0%B8%D1%8F" title="Фотохимия – búlgarska" lang="bg" hreflang="bg" data-title="Фотохимия" data-language-autonym="Български" data-language-local-name="búlgarska" 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%86%E0%A6%B2%E0%A7%8B%E0%A6%95-%E0%A6%B0%E0%A6%B8%E0%A6%BE%E0%A6%AF%E0%A6%BC%E0%A6%A8" title="আলোক-রসায়ন – bengalska" lang="bn" hreflang="bn" data-title="আলোক-রসায়ন" data-language-autonym="বাংলা" data-language-local-name="bengalska" 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/Fotohemija" title="Fotohemija – bosníska" lang="bs" hreflang="bs" data-title="Fotohemija" data-language-autonym="Bosanski" data-language-local-name="bosníska" 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/Fotoqu%C3%ADmica" title="Fotoquímica – katalónska" lang="ca" hreflang="ca" data-title="Fotoquímica" data-language-autonym="Català" data-language-local-name="katalónska" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikipedia.org/wiki/Fotochemie" title="Fotochemie – tékkneska" lang="cs" hreflang="cs" data-title="Fotochemie" data-language-autonym="Čeština" data-language-local-name="tékkneska" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Photochemie" title="Photochemie – þýska" lang="de" hreflang="de" data-title="Photochemie" data-language-autonym="Deutsch" data-language-local-name="þýska" 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%A6%CF%89%CF%84%CE%BF%CF%87%CE%B7%CE%BC%CE%B5%CE%AF%CE%B1" title="Φωτοχημεία – gríska" lang="el" hreflang="el" data-title="Φωτοχημεία" data-language-autonym="Ελληνικά" data-language-local-name="gríska" 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/Photochemistry" title="Photochemistry – enska" lang="en" hreflang="en" data-title="Photochemistry" data-language-autonym="English" data-language-local-name="enska" class="interlanguage-link-target"><span>English</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Fotoqu%C3%ADmica" title="Fotoquímica – spænska" lang="es" hreflang="es" data-title="Fotoquímica" data-language-autonym="Español" data-language-local-name="spænska" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-eu mw-list-item"><a href="https://eu.wikipedia.org/wiki/Fotokimika" title="Fotokimika – baskneska" lang="eu" hreflang="eu" data-title="Fotokimika" data-language-autonym="Euskara" data-language-local-name="baskneska" 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/%D9%81%D8%AA%D9%88%D8%B4%DB%8C%D9%85%DB%8C" title="فتوشیمی – persneska" lang="fa" hreflang="fa" data-title="فتوشیمی" data-language-autonym="فارسی" data-language-local-name="persneska" 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/Valokemia" title="Valokemia – finnska" lang="fi" hreflang="fi" data-title="Valokemia" data-language-autonym="Suomi" data-language-local-name="finnska" 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/Photochimie" title="Photochimie – franska" lang="fr" hreflang="fr" data-title="Photochimie" data-language-autonym="Français" data-language-local-name="franska" 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/F%C3%B3taiceimic" title="Fótaiceimic – írska" lang="ga" hreflang="ga" data-title="Fótaiceimic" data-language-autonym="Gaeilge" data-language-local-name="írska" 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%A4%D7%95%D7%98%D7%95%D7%9B%D7%99%D7%9E%D7%99%D7%94" title="פוטוכימיה – hebreska" lang="he" hreflang="he" data-title="פוטוכימיה" data-language-autonym="עברית" data-language-local-name="hebreska" 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%A5%8D%E0%A4%B0%E0%A4%95%E0%A4%BE%E0%A4%B6_%E0%A4%B0%E0%A4%B8%E0%A4%BE%E0%A4%AF%E0%A4%A8" title="प्रकाश रसायन – hindí" lang="hi" hreflang="hi" data-title="प्रकाश रसायन" data-language-autonym="हिन्दी" data-language-local-name="hindí" 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/Fotokemija" title="Fotokemija – króatíska" lang="hr" hreflang="hr" data-title="Fotokemija" data-language-autonym="Hrvatski" data-language-local-name="króatíska" 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/Fotok%C3%A9mia" title="Fotokémia – ungverska" lang="hu" hreflang="hu" data-title="Fotokémia" data-language-autonym="Magyar" data-language-local-name="ungverska" class="interlanguage-link-target"><span>Magyar</span></a></li><li class="interlanguage-link interwiki-ia mw-list-item"><a href="https://ia.wikipedia.org/wiki/Photochimia" title="Photochimia – interlingua" lang="ia" hreflang="ia" data-title="Photochimia" data-language-autonym="Interlingua" data-language-local-name="interlingua" class="interlanguage-link-target"><span>Interlingua</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/Fotokimia" title="Fotokimia – indónesíska" lang="id" hreflang="id" data-title="Fotokimia" data-language-autonym="Bahasa Indonesia" data-language-local-name="indónesíska" class="interlanguage-link-target"><span>Bahasa Indonesia</span></a></li><li class="interlanguage-link interwiki-io mw-list-item"><a href="https://io.wikipedia.org/wiki/Fotokemio" title="Fotokemio – ídó" lang="io" hreflang="io" data-title="Fotokemio" data-language-autonym="Ido" data-language-local-name="ídó" class="interlanguage-link-target"><span>Ido</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/Fotochimica" title="Fotochimica – ítalska" lang="it" hreflang="it" data-title="Fotochimica" data-language-autonym="Italiano" data-language-local-name="ítalska" 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%85%89%E5%8C%96%E5%AD%A6" title="光化学 – japanska" lang="ja" hreflang="ja" data-title="光化学" data-language-autonym="日本語" data-language-local-name="japanska" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-jv mw-list-item"><a href="https://jv.wikipedia.org/wiki/Fotokimia" title="Fotokimia – javanska" lang="jv" hreflang="jv" data-title="Fotokimia" data-language-autonym="Jawa" data-language-local-name="javanska" class="interlanguage-link-target"><span>Jawa</span></a></li><li class="interlanguage-link interwiki-ka mw-list-item"><a href="https://ka.wikipedia.org/wiki/%E1%83%A4%E1%83%9D%E1%83%A2%E1%83%9D%E1%83%A5%E1%83%98%E1%83%9B%E1%83%98%E1%83%90" title="ფოტოქიმია – georgíska" lang="ka" hreflang="ka" data-title="ფოტოქიმია" data-language-autonym="ქართული" data-language-local-name="georgíska" class="interlanguage-link-target"><span>ქართული</span></a></li><li class="interlanguage-link interwiki-kk mw-list-item"><a href="https://kk.wikipedia.org/wiki/%D0%A4%D0%BE%D1%82%D0%BE%D1%85%D0%B8%D0%BC%D0%B8%D1%8F" title="Фотохимия – kasakska" lang="kk" hreflang="kk" data-title="Фотохимия" data-language-autonym="Қазақша" data-language-local-name="kasakska" class="interlanguage-link-target"><span>Қазақша</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%EA%B4%91%ED%99%94%ED%95%99" title="광화학 – kóreska" lang="ko" hreflang="ko" data-title="광화학" data-language-autonym="한국어" data-language-local-name="kóreska" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-ky mw-list-item"><a href="https://ky.wikipedia.org/wiki/%D0%A4%D0%BE%D1%82%D0%BE%D1%85%D0%B8%D0%BC%D0%B8%D1%8F" title="Фотохимия – kirgiska" lang="ky" hreflang="ky" data-title="Фотохимия" data-language-autonym="Кыргызча" data-language-local-name="kirgiska" class="interlanguage-link-target"><span>Кыргызча</span></a></li><li class="interlanguage-link interwiki-mk mw-list-item"><a href="https://mk.wikipedia.org/wiki/%D0%A4%D0%BE%D1%82%D0%BE%D1%85%D0%B5%D0%BC%D0%B8%D1%98%D0%B0" title="Фотохемија – makedónska" lang="mk" hreflang="mk" data-title="Фотохемија" data-language-autonym="Македонски" data-language-local-name="makedónska" class="interlanguage-link-target"><span>Македонски</span></a></li><li class="interlanguage-link interwiki-ms mw-list-item"><a href="https://ms.wikipedia.org/wiki/Fotokimia" title="Fotokimia – malaíska" lang="ms" hreflang="ms" data-title="Fotokimia" data-language-autonym="Bahasa Melayu" data-language-local-name="malaíska" class="interlanguage-link-target"><span>Bahasa Melayu</span></a></li><li class="interlanguage-link interwiki-my mw-list-item"><a href="https://my.wikipedia.org/wiki/%E1%80%A1%E1%80%9C%E1%80%84%E1%80%BA%E1%80%B8%E1%80%93%E1%80%AC%E1%80%90%E1%80%AF%E1%80%97%E1%80%B1%E1%80%92" title="အလင်းဓာတုဗေဒ – búrmneska" lang="my" hreflang="my" data-title="အလင်းဓာတုဗေဒ" data-language-autonym="မြန်မာဘာသာ" data-language-local-name="búrmneska" class="interlanguage-link-target"><span>မြန်မာဘာသာ</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/Fotochemie" title="Fotochemie – hollenska" lang="nl" hreflang="nl" data-title="Fotochemie" data-language-autonym="Nederlands" data-language-local-name="hollenska" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-no mw-list-item"><a href="https://no.wikipedia.org/wiki/Fotokjemi" title="Fotokjemi – norskt bókmál" lang="nb" hreflang="nb" data-title="Fotokjemi" data-language-autonym="Norsk bokmål" data-language-local-name="norskt bókmál" class="interlanguage-link-target"><span>Norsk bokmål</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Fotochemia" title="Fotochemia – pólska" lang="pl" hreflang="pl" data-title="Fotochemia" data-language-autonym="Polski" data-language-local-name="pólska" 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/Fotoch%C3%ACmica" title="Fotochìmica – Piedmontese" lang="pms" hreflang="pms" data-title="Fotochìmica" data-language-autonym="Piemontèis" data-language-local-name="Piedmontese" class="interlanguage-link-target"><span>Piemontèis</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/Fotoqu%C3%ADmica" title="Fotoquímica – portúgalska" lang="pt" hreflang="pt" data-title="Fotoquímica" data-language-autonym="Português" data-language-local-name="portúgalska" 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/Fotochimie" title="Fotochimie – rúmenska" lang="ro" hreflang="ro" data-title="Fotochimie" data-language-autonym="Română" data-language-local-name="rúmenska" 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%A4%D0%BE%D1%82%D0%BE%D1%85%D0%B8%D0%BC%D0%B8%D1%8F" title="Фотохимия – rússneska" lang="ru" hreflang="ru" data-title="Фотохимия" data-language-autonym="Русский" data-language-local-name="rússneska" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-rue mw-list-item"><a href="https://rue.wikipedia.org/wiki/%D0%A4%D0%BE%D1%82%D0%BE%D1%85%D0%B5%D0%BC%D0%B8%D1%8F" title="Фотохемия – Rusyn" lang="rue" hreflang="rue" data-title="Фотохемия" data-language-autonym="Русиньскый" data-language-local-name="Rusyn" class="interlanguage-link-target"><span>Русиньскый</span></a></li><li class="interlanguage-link interwiki-sh mw-list-item"><a href="https://sh.wikipedia.org/wiki/Fotohemija" title="Fotohemija – serbókróatíska" lang="sh" hreflang="sh" data-title="Fotohemija" data-language-autonym="Srpskohrvatski / српскохрватски" data-language-local-name="serbókróatíska" class="interlanguage-link-target"><span>Srpskohrvatski / српскохрватски</span></a></li><li class="interlanguage-link interwiki-simple mw-list-item"><a href="https://simple.wikipedia.org/wiki/Photochemistry" title="Photochemistry – Simple English" lang="en-simple" hreflang="en-simple" data-title="Photochemistry" 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/Fotoch%C3%A9mia" title="Fotochémia – slóvakíska" lang="sk" hreflang="sk" data-title="Fotochémia" data-language-autonym="Slovenčina" data-language-local-name="slóvakíska" 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/Fotokemija" title="Fotokemija – slóvenska" lang="sl" hreflang="sl" data-title="Fotokemija" data-language-autonym="Slovenščina" data-language-local-name="slóvenska" class="interlanguage-link-target"><span>Slovenščina</span></a></li><li class="interlanguage-link interwiki-sr mw-list-item"><a href="https://sr.wikipedia.org/wiki/Fotohemija" title="Fotohemija – serbneska" lang="sr" hreflang="sr" data-title="Fotohemija" data-language-autonym="Српски / srpski" data-language-local-name="serbneska" 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/Fotokemi" title="Fotokemi – sænska" lang="sv" hreflang="sv" data-title="Fotokemi" data-language-autonym="Svenska" data-language-local-name="sænska" 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%92%E0%AE%B3%E0%AE%BF_%E0%AE%B5%E0%AF%87%E0%AE%A4%E0%AE%BF%E0%AE%AF%E0%AE%BF%E0%AE%AF%E0%AE%B2%E0%AF%8D" title="ஒளி வேதியியல் – tamílska" lang="ta" hreflang="ta" data-title="ஒளி வேதியியல்" data-language-autonym="தமிழ்" data-language-local-name="tamílska" class="interlanguage-link-target"><span>தமிழ்</span></a></li><li class="interlanguage-link interwiki-th mw-list-item"><a href="https://th.wikipedia.org/wiki/%E0%B9%80%E0%B8%84%E0%B8%A1%E0%B8%B5%E0%B9%81%E0%B8%AA%E0%B8%87" title="เคมีแสง – taílenska" lang="th" hreflang="th" data-title="เคมีแสง" data-language-autonym="ไทย" data-language-local-name="taílenska" class="interlanguage-link-target"><span>ไทย</span></a></li><li class="interlanguage-link interwiki-tr mw-list-item"><a href="https://tr.wikipedia.org/wiki/Fotokimya" title="Fotokimya – tyrkneska" lang="tr" hreflang="tr" data-title="Fotokimya" data-language-autonym="Türkçe" data-language-local-name="tyrkneska" 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%A4%D0%BE%D1%82%D0%BE%D1%85%D1%96%D0%BC%D1%96%D1%8F" title="Фотохімія – úkraínska" lang="uk" hreflang="uk" data-title="Фотохімія" data-language-autonym="Українська" data-language-local-name="úkraínska" 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/%D9%86%D9%88%D8%B1%DB%8C_%DA%A9%DB%8C%D9%85%DB%8C%D8%A7%D8%A1" title="نوری کیمیاء – úrdú" lang="ur" hreflang="ur" data-title="نوری کیمیاء" data-language-autonym="اردو" data-language-local-name="úrdú" class="interlanguage-link-target"><span>اردو</span></a></li><li class="interlanguage-link interwiki-uz mw-list-item"><a href="https://uz.wikipedia.org/wiki/Fotokimyo" title="Fotokimyo – úsbekska" lang="uz" hreflang="uz" data-title="Fotokimyo" data-language-autonym="Oʻzbekcha / ўзбекча" data-language-local-name="úsbekska" class="interlanguage-link-target"><span>Oʻzbekcha / ўзбекча</span></a></li><li class="interlanguage-link interwiki-vi mw-list-item"><a href="https://vi.wikipedia.org/wiki/Quang_h%C3%B3a_h%E1%BB%8Dc" title="Quang hóa học – víetnamska" lang="vi" hreflang="vi" data-title="Quang hóa học" data-language-autonym="Tiếng Việt" data-language-local-name="víetnamska" 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%E5%8C%96%E5%AD%A6" title="光化学 – wu-kínverska" lang="wuu" hreflang="wuu" data-title="光化学" data-language-autonym="吴语" data-language-local-name="wu-kínverska" 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%85%89%E5%8C%96%E5%AD%A6" title="光化学 – kínverska" lang="zh" hreflang="zh" data-title="光化学" data-language-autonym="中文" data-language-local-name="kínverska" class="interlanguage-link-target"><span>中文</span></a></li><li class="interlanguage-link interwiki-zh-min-nan mw-list-item"><a href="https://zh-min-nan.wikipedia.org/wiki/Kng-h%C3%B2a-ha%CC%8Dk" title="Kng-hòa-ha̍k – Minnan" lang="nan" hreflang="nan" data-title="Kng-hòa-ha̍k" 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%85%89%E5%8C%96%E5%AD%B8" title="光化學 – kantónska" lang="yue" hreflang="yue" data-title="光化學" data-language-autonym="粵語" data-language-local-name="kantónska" class="interlanguage-link-target"><span>粵語</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/Q188651#sitelinks-wikipedia" title="Breyta tungumálatenglum" class="wbc-editpage">Breyta tenglum</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="Nafnrými"> <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/Lj%C3%B3sefnafr%C3%A6%C3%B0i" title="Sýna efnissíðuna [c]" accesskey="c"><span>Síða</span></a></li><li id="ca-talk" class="new vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Spjall:Lj%C3%B3sefnafr%C3%A6%C3%B0i&action=edit&redlink=1" rel="discussion" class="new" title="Spallsíða þessarar síðu (síða er ekki enn til) [t]" accesskey="t"><span>Spjall</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="Breyta tungumálaafbrigði" > <label id="vector-variants-dropdown-label" for="vector-variants-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet" aria-hidden="true" ><span class="vector-dropdown-label-text">íslenska</span> </label> <div class="vector-dropdown-content"> <div id="p-variants" class="vector-menu mw-portlet mw-portlet-variants emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> </div> </div> </nav> </div> <div id="right-navigation" class="vector-collapsible"> <nav aria-label="Sýn"> <div id="p-views" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-views" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-view" class="selected vector-tab-noicon mw-list-item"><a href="/wiki/Lj%C3%B3sefnafr%C3%A6%C3%B0i"><span>Lesa</span></a></li><li id="ca-ve-edit" class="vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Lj%C3%B3sefnafr%C3%A6%C3%B0i&veaction=edit" title="Breyta þessari síðu [v]" accesskey="v"><span>Breyta</span></a></li><li id="ca-edit" class="collapsible vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Lj%C3%B3sefnafr%C3%A6%C3%B0i&action=edit" title="Breyta frumkóða síðunnar [e]" accesskey="e"><span>Breyta frumkóða</span></a></li><li id="ca-history" class="vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Lj%C3%B3sefnafr%C3%A6%C3%B0i&action=history" title="Eldri útgáfur af síðunni. 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vector-page-tools-pinnable-header vector-pinnable-header-unpinned" data-feature-name="page-tools-pinned" data-pinnable-element-id="vector-page-tools" data-pinned-container-id="vector-page-tools-pinned-container" data-unpinned-container-id="vector-page-tools-unpinned-container" > <div class="vector-pinnable-header-label">Verkfæri</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-page-tools.pin">færa í hliðarstiku</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-page-tools.unpin">fela</button> </div> <div id="p-cactions" class="vector-menu mw-portlet mw-portlet-cactions emptyPortlet vector-has-collapsible-items" title="Fleiri valkostir" > <div class="vector-menu-heading"> Aðgerðir </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-more-view" class="selected vector-more-collapsible-item mw-list-item"><a href="/wiki/Lj%C3%B3sefnafr%C3%A6%C3%B0i"><span>Lesa</span></a></li><li id="ca-more-ve-edit" class="vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=Lj%C3%B3sefnafr%C3%A6%C3%B0i&veaction=edit" title="Breyta þessari síðu [v]" accesskey="v"><span>Breyta</span></a></li><li id="ca-more-edit" class="collapsible vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=Lj%C3%B3sefnafr%C3%A6%C3%B0i&action=edit" title="Breyta frumkóða síðunnar [e]" accesskey="e"><span>Breyta frumkóða</span></a></li><li id="ca-more-history" class="vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=Lj%C3%B3sefnafr%C3%A6%C3%B0i&action=history"><span>Breytingaskrá</span></a></li> </ul> </div> </div> <div id="p-tb" class="vector-menu mw-portlet mw-portlet-tb" > <div class="vector-menu-heading"> Almennt </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="t-whatlinkshere" class="mw-list-item"><a href="/wiki/Kerfiss%C3%AD%C3%B0a:S%C3%AD%C3%B0ur_sem_tengjast_hinga%C3%B0/Lj%C3%B3sefnafr%C3%A6%C3%B0i" title="Listi yfir síður sem tengjast í þessa [j]" accesskey="j"><span>Hvað tengist hingað</span></a></li><li id="t-recentchangeslinked" class="mw-list-item"><a href="/wiki/Kerfiss%C3%AD%C3%B0a:N%C3%BDlegar_breytingar_tengdar/Lj%C3%B3sefnafr%C3%A6%C3%B0i" rel="nofollow" title="Nýlegar breytingar á ítengdum síðum [k]" accesskey="k"><span>Skyldar breytingar</span></a></li><li id="t-upload" class="mw-list-item"><a href="/wiki/Wikipedia:Hlaða_inn_skrá" title="Hlaða inn skrám [u]" accesskey="u"><span>Hlaða inn skrá</span></a></li><li id="t-specialpages" class="mw-list-item"><a href="/wiki/Kerfiss%C3%AD%C3%B0a:Kerfiss%C3%AD%C3%B0ur" title="Listi yfir kerfissíður [q]" accesskey="q"><span>Kerfissíður</span></a></li><li id="t-permalink" class="mw-list-item"><a href="/w/index.php?title=Lj%C3%B3sefnafr%C3%A6%C3%B0i&oldid=1372855" title="Varanlegur tengill í þessa útgáfu síðunnar"><span>Varanlegur tengill</span></a></li><li id="t-info" class="mw-list-item"><a href="/w/index.php?title=Lj%C3%B3sefnafr%C3%A6%C3%B0i&action=info" title="Frekari upplýsingar um þessa síðu"><span>Síðuupplýsingar</span></a></li><li id="t-cite" class="mw-list-item"><a href="/w/index.php?title=Kerfiss%C3%AD%C3%B0a:CiteThisPage&page=Lj%C3%B3sefnafr%C3%A6%C3%B0i&id=1372855&wpFormIdentifier=titleform" title="Upplýsingar um hvernig á að vitna í þessa síðu"><span>Vitna í þessa síðu</span></a></li><li id="t-urlshortener" class="mw-list-item"><a href="/w/index.php?title=Kerfiss%C3%AD%C3%B0a:UrlShortener&url=https%3A%2F%2Fis.wikipedia.org%2Fwiki%2FLj%25C3%25B3sefnafr%25C3%25A6%25C3%25B0i"><span>Fá styttan tengil</span></a></li><li id="t-urlshortener-qrcode" class="mw-list-item"><a href="/w/index.php?title=Kerfiss%C3%AD%C3%B0a:QrCode&url=https%3A%2F%2Fis.wikipedia.org%2Fwiki%2FLj%25C3%25B3sefnafr%25C3%25A6%25C3%25B0i"><span>Niðurhlaða QR-kóða</span></a></li> </ul> </div> </div> <div id="p-coll-print_export" class="vector-menu mw-portlet mw-portlet-coll-print_export" > <div class="vector-menu-heading"> Prenta/flytja út </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="coll-create_a_book" class="mw-list-item"><a href="/w/index.php?title=Kerfiss%C3%AD%C3%B0a:Book&bookcmd=book_creator&referer=Lj%C3%B3sefnafr%C3%A6%C3%B0i"><span>Búa til bók</span></a></li><li id="coll-download-as-rl" class="mw-list-item"><a href="/w/index.php?title=Kerfiss%C3%AD%C3%B0a:DownloadAsPdf&page=Lj%C3%B3sefnafr%C3%A6%C3%B0i&action=show-download-screen"><span>Sækja sem PDF</span></a></li><li id="t-print" class="mw-list-item"><a href="/w/index.php?title=Lj%C3%B3sefnafr%C3%A6%C3%B0i&printable=yes" title="Prentanleg útgáfa af þessari síðu [p]" accesskey="p"><span>Prentvæn útgáfa</span></a></li> </ul> </div> </div> <div id="p-wikibase-otherprojects" class="vector-menu mw-portlet mw-portlet-wikibase-otherprojects" > <div class="vector-menu-heading"> Í öðrum verkefnum </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="wb-otherproject-link wb-otherproject-commons mw-list-item"><a href="https://commons.wikimedia.org/wiki/Category:Photochemistry" hreflang="en"><span>Wikimedia Commons</span></a></li><li id="t-wikibase" class="wb-otherproject-link wb-otherproject-wikibase-dataitem mw-list-item"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q188651" title="Tengill á tengdan hlut í gagnagrunni [g]" accesskey="g"><span>Wikidata hlutur</span></a></li> </ul> </div> </div> </div> </div> </div> </div> </nav> </div> </div> </div> <div class="vector-column-end"> <div class="vector-sticky-pinned-container"> <nav class="vector-page-tools-landmark" aria-label="Síðuverkfæri"> <div id="vector-page-tools-pinned-container" class="vector-pinned-container"> </div> </nav> <nav class="vector-appearance-landmark" aria-label="Útlit"> <div id="vector-appearance-pinned-container" class="vector-pinned-container"> <div id="vector-appearance" class="vector-appearance vector-pinnable-element"> <div class="vector-pinnable-header vector-appearance-pinnable-header vector-pinnable-header-pinned" data-feature-name="appearance-pinned" data-pinnable-element-id="vector-appearance" data-pinned-container-id="vector-appearance-pinned-container" data-unpinned-container-id="vector-appearance-unpinned-container" > <div class="vector-pinnable-header-label">Útlit</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-appearance.pin">færa í hliðarstiku</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-appearance.unpin">fela</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 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