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class="vector-toc vector-pinnable-element"> <div class="vector-pinnable-header vector-toc-pinnable-header vector-pinnable-header-pinned" data-feature-name="toc-pinned" data-pinnable-element-id="vector-toc" > <h2 class="vector-pinnable-header-label">Indhold</h2> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-toc.pin">flyt til sidebjælken</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-toc.unpin">skjul</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">Indledning</div> </a> </li> <li id="toc-RF-strømmes_egenskaber" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#RF-strømmes_egenskaber"> <div class="vector-toc-text"> <span class="vector-toc-numb">1</span> <span>RF-strømmes egenskaber</span> </div> </a> <ul id="toc-RF-strømmes_egenskaber-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Radiokommunikation" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Radiokommunikation"> <div class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>Radiokommunikation</span> </div> </a> <ul id="toc-Radiokommunikation-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Frekvens" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Frekvens"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Frekvens</span> </div> </a> <ul id="toc-Frekvens-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Se_også" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Se_også"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>Se også</span> </div> </a> <ul id="toc-Se_også-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Kilder/referencer" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Kilder/referencer"> <div class="vector-toc-text"> <span class="vector-toc-numb">5</span> <span>Kilder/referencer</span> </div> </a> <ul id="toc-Kilder/referencer-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Eksterne_henvisninger" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Eksterne_henvisninger"> <div class="vector-toc-text"> <span class="vector-toc-numb">6</span> <span>Eksterne henvisninger</span> </div> </a> <ul id="toc-Eksterne_henvisninger-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="Indhold" 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="Vis/skjul indholdsfortegnelsen" > <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">Vis/skjul indholdsfortegnelsen</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">Radiofrekvens</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="Gå til en artikel på et andet sprog. Tilgængelig på 37 sprog" > <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-37" 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">37 sprog</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-ar badge-Q70893996 mw-list-item" title=""><a href="https://ar.wikipedia.org/wiki/%D8%AA%D8%B1%D8%AF%D8%AF_%D8%A7%D9%84%D8%B1%D8%A7%D8%AF%D9%8A%D9%88" title="تردد الراديو – arabisk" lang="ar" hreflang="ar" data-title="تردد الراديو" data-language-autonym="العربية" data-language-local-name="arabisk" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-bn mw-list-item"><a href="https://bn.wikipedia.org/wiki/%E0%A6%AC%E0%A7%87%E0%A6%A4%E0%A6%BE%E0%A6%B0_%E0%A6%95%E0%A6%AE%E0%A7%8D%E0%A6%AA%E0%A6%BE%E0%A6%99%E0%A7%8D%E0%A6%95" title="বেতার কম্পাঙ্ক – bengali" lang="bn" hreflang="bn" data-title="বেতার কম্পাঙ্ক" data-language-autonym="বাংলা" data-language-local-name="bengali" 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/Radiofrekvencija" title="Radiofrekvencija – bosnisk" lang="bs" hreflang="bs" data-title="Radiofrekvencija" data-language-autonym="Bosanski" data-language-local-name="bosnisk" 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/Radiofreq%C3%BC%C3%A8ncia" title="Radiofreqüència – catalansk" lang="ca" hreflang="ca" data-title="Radiofreqüència" data-language-autonym="Català" data-language-local-name="catalansk" 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/Vysokofrekven%C4%8Dn%C3%AD" title="Vysokofrekvenční – tjekkisk" lang="cs" hreflang="cs" data-title="Vysokofrekvenční" data-language-autonym="Čeština" data-language-local-name="tjekkisk" 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/Hochfrequenz" title="Hochfrequenz – tysk" lang="de" hreflang="de" data-title="Hochfrequenz" data-language-autonym="Deutsch" data-language-local-name="tysk" 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%A1%CE%B1%CE%B4%CE%B9%CE%BF%CF%83%CF%85%CF%87%CE%BD%CF%8C%CF%84%CE%B7%CF%84%CE%B1" title="Ραδιοσυχνότητα – græsk" lang="el" hreflang="el" data-title="Ραδιοσυχνότητα" data-language-autonym="Ελληνικά" data-language-local-name="græsk" 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/Radio_frequency" title="Radio frequency – engelsk" lang="en" hreflang="en" data-title="Radio frequency" data-language-autonym="English" data-language-local-name="engelsk" 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/Altfrekvenco" title="Altfrekvenco – esperanto" lang="eo" hreflang="eo" data-title="Altfrekvenco" 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/Radiofrecuencia" title="Radiofrecuencia – spansk" lang="es" hreflang="es" data-title="Radiofrecuencia" data-language-autonym="Español" data-language-local-name="spansk" 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/Raadiosagedus" title="Raadiosagedus – estisk" lang="et" hreflang="et" data-title="Raadiosagedus" data-language-autonym="Eesti" data-language-local-name="estisk" class="interlanguage-link-target"><span>Eesti</span></a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/%D9%81%D8%B1%DA%A9%D8%A7%D9%86%D8%B3_%D8%B1%D8%A7%D8%AF%DB%8C%D9%88%DB%8C%DB%8C" title="فرکانس رادیویی – persisk" lang="fa" hreflang="fa" data-title="فرکانس رادیویی" data-language-autonym="فارسی" data-language-local-name="persisk" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/Radio-fr%C3%A9quence" title="Radio-fréquence – fransk" lang="fr" hreflang="fr" data-title="Radio-fréquence" data-language-autonym="Français" data-language-local-name="fransk" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-hi mw-list-item"><a href="https://hi.wikipedia.org/wiki/%E0%A4%B0%E0%A5%87%E0%A4%A1%E0%A4%BF%E0%A4%AF%E0%A5%8B_%E0%A4%86%E0%A4%B5%E0%A5%83%E0%A4%A4%E0%A5%8D%E0%A4%A4%E0%A4%BF" title="रेडियो आवृत्ति – hindi" lang="hi" hreflang="hi" data-title="रेडियो आवृत्ति" data-language-autonym="हिन्दी" data-language-local-name="hindi" class="interlanguage-link-target"><span>हिन्दी</span></a></li><li class="interlanguage-link interwiki-hu mw-list-item"><a href="https://hu.wikipedia.org/wiki/R%C3%A1di%C3%B3frekvencia" title="Rádiófrekvencia – ungarsk" lang="hu" hreflang="hu" data-title="Rádiófrekvencia" data-language-autonym="Magyar" data-language-local-name="ungarsk" class="interlanguage-link-target"><span>Magyar</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/Frekuensi_radio" title="Frekuensi radio – indonesisk" lang="id" hreflang="id" data-title="Frekuensi radio" data-language-autonym="Bahasa Indonesia" data-language-local-name="indonesisk" 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/Radiofrequenza" title="Radiofrequenza – italiensk" lang="it" hreflang="it" data-title="Radiofrequenza" data-language-autonym="Italiano" data-language-local-name="italiensk" 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/%E9%AB%98%E5%91%A8%E6%B3%A2" title="高周波 – japansk" lang="ja" hreflang="ja" data-title="高周波" data-language-autonym="日本語" data-language-local-name="japansk" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-kcg mw-list-item"><a href="https://kcg.wikipedia.org/wiki/Mita_(ridyo)" title="Mita (ridyo) – tyap" lang="kcg" hreflang="kcg" data-title="Mita (ridyo)" data-language-autonym="Tyap" data-language-local-name="tyap" class="interlanguage-link-target"><span>Tyap</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%EB%AC%B4%EC%84%A0%EC%A3%BC%ED%8C%8C%EC%88%98" title="무선주파수 – koreansk" lang="ko" hreflang="ko" data-title="무선주파수" data-language-autonym="한국어" data-language-local-name="koreansk" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-ms mw-list-item"><a href="https://ms.wikipedia.org/wiki/Frekuensi_radio" title="Frekuensi radio – malajisk" lang="ms" hreflang="ms" data-title="Frekuensi radio" data-language-autonym="Bahasa Melayu" data-language-local-name="malajisk" 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/Hoogfrequent" title="Hoogfrequent – nederlandsk" lang="nl" hreflang="nl" data-title="Hoogfrequent" data-language-autonym="Nederlands" data-language-local-name="nederlandsk" 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/Radiofrekvens" title="Radiofrekvens – nynorsk" lang="nn" hreflang="nn" data-title="Radiofrekvens" data-language-autonym="Norsk nynorsk" data-language-local-name="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/Radiofrekvens" title="Radiofrekvens – bokmål" lang="nb" hreflang="nb" data-title="Radiofrekvens" data-language-autonym="Norsk bokmål" data-language-local-name="bokmål" class="interlanguage-link-target"><span>Norsk bokmål</span></a></li><li class="interlanguage-link interwiki-pa mw-list-item"><a href="https://pa.wikipedia.org/wiki/%E0%A8%B0%E0%A9%87%E0%A8%A1%E0%A9%80%E0%A8%93_%E0%A8%B5%E0%A8%BE%E0%A8%B0%E0%A8%B5%E0%A8%BE%E0%A8%B0%E0%A8%A4%E0%A8%BE" title="ਰੇਡੀਓ ਵਾਰਵਾਰਤਾ – punjabisk" lang="pa" hreflang="pa" data-title="ਰੇਡੀਓ ਵਾਰਵਾਰਤਾ" data-language-autonym="ਪੰਜਾਬੀ" data-language-local-name="punjabisk" 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/Cz%C4%99stotliwo%C5%9B%C4%87_radiowa" title="Częstotliwość radiowa – polsk" lang="pl" hreflang="pl" data-title="Częstotliwość radiowa" data-language-autonym="Polski" data-language-local-name="polsk" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/Radiofrequ%C3%AAncia" title="Radiofrequência – portugisisk" lang="pt" hreflang="pt" data-title="Radiofrequência" data-language-autonym="Português" data-language-local-name="portugisisk" 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/Radiofrecven%C8%9B%C4%83" title="Radiofrecvență – rumænsk" lang="ro" hreflang="ro" data-title="Radiofrecvență" data-language-autonym="Română" data-language-local-name="rumænsk" class="interlanguage-link-target"><span>Română</span></a></li><li class="interlanguage-link interwiki-simple mw-list-item"><a href="https://simple.wikipedia.org/wiki/Radio_frequency" title="Radio frequency – Simple English" lang="en-simple" hreflang="en-simple" data-title="Radio frequency" 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-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/Radiofrekvens" title="Radiofrekvens – svensk" lang="sv" hreflang="sv" data-title="Radiofrekvens" data-language-autonym="Svenska" data-language-local-name="svensk" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-th mw-list-item"><a href="https://th.wikipedia.org/wiki/%E0%B8%84%E0%B8%A7%E0%B8%B2%E0%B8%A1%E0%B8%96%E0%B8%B5%E0%B9%88%E0%B8%A7%E0%B8%B4%E0%B8%97%E0%B8%A2%E0%B8%B8" title="ความถี่วิทยุ – thai" lang="th" hreflang="th" data-title="ความถี่วิทยุ" data-language-autonym="ไทย" data-language-local-name="thai" 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/Radyo_frekans" title="Radyo frekans – tyrkisk" lang="tr" hreflang="tr" data-title="Radyo frekans" data-language-autonym="Türkçe" data-language-local-name="tyrkisk" 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%A0%D0%B0%D0%B4%D1%96%D0%BE%D1%87%D0%B0%D1%81%D1%82%D0%BE%D1%82%D0%B0" title="Радіочастота – ukrainsk" lang="uk" hreflang="uk" data-title="Радіочастота" data-language-autonym="Українська" data-language-local-name="ukrainsk" 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%B1%DB%8C%DA%88%DB%8C%D9%88_%D9%81%D8%B1%DB%8C%DA%A9%D9%88%D8%A6%D9%86%D8%B3%DB%8C" title="ریڈیو فریکوئنسی – urdu" lang="ur" hreflang="ur" data-title="ریڈیو فریکوئنسی" data-language-autonym="اردو" data-language-local-name="urdu" class="interlanguage-link-target"><span>اردو</span></a></li><li class="interlanguage-link interwiki-vi mw-list-item"><a href="https://vi.wikipedia.org/wiki/T%E1%BA%A7n_s%E1%BB%91_v%C3%B4_tuy%E1%BA%BFn" title="Tần số vô tuyến – vietnamesisk" lang="vi" hreflang="vi" data-title="Tần số vô tuyến" data-language-autonym="Tiếng Việt" data-language-local-name="vietnamesisk" class="interlanguage-link-target"><span>Tiếng Việt</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/%E5%B0%84%E9%A0%BB" title="射頻 – kinesisk" lang="zh" hreflang="zh" data-title="射頻" data-language-autonym="中文" data-language-local-name="kinesisk" class="interlanguage-link-target"><span>中文</span></a></li><li class="interlanguage-link interwiki-zh-yue mw-list-item"><a href="https://zh-yue.wikipedia.org/wiki/%E7%84%A1%E7%B7%9A%E5%B0%84%E9%A0%BB" title="無線射頻 – kantonesisk" lang="yue" hreflang="yue" data-title="無線射頻" data-language-autonym="粵語" data-language-local-name="kantonesisk" 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/Q3396184#sitelinks-wikipedia" title="Redigér sproglinks" class="wbc-editpage">Redigér links</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="Navnerum"> <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/Radiofrekvens" title="Se indholdssiden [c]" accesskey="c"><span>Artikel</span></a></li><li id="ca-talk" class="new vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Diskussion:Radiofrekvens&action=edit&redlink=1" rel="discussion" class="new" title="Diskussion om indholdet på siden (ikke skrevet endnu) [t]" accesskey="t"><span>Diskussion</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" 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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">Udseende</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-appearance.pin">flyt til sidebjælken</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-appearance.unpin">skjul</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">Fra Wikipedia, den frie encyklopædi</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="da" dir="ltr"><dl><dd><span typeof="mw:File"><span><img src="//upload.wikimedia.org/wikipedia/commons/thumb/6/6f/Confusion_colour.svg/15px-Confusion_colour.svg.png" decoding="async" width="15" height="12" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/6/6f/Confusion_colour.svg/23px-Confusion_colour.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/6/6f/Confusion_colour.svg/30px-Confusion_colour.svg.png 2x" data-file-width="260" data-file-height="200" /></span></span> <i>Ikke at forveksle med <a href="/wiki/H%C3%B8jfrekvens_(3_MHz_-_30_MHz)" title="Højfrekvens (3 MHz - 30 MHz)">Højfrekvens (3 MHz - 30 MHz)</a>.</i></dd></dl> <p><b>Radiofrekvens</b> eller <b>højfrekvens</b> (<b>RF</b>, <b>HF</b>) er enhver <a href="/wiki/Elektromagnetisk_b%C3%B8lge" class="mw-redirect" title="Elektromagnetisk bølge">elektromagnetisk bølge</a> med en <a href="/wiki/Frekvens" title="Frekvens">frekvens</a>, som ligger i intervallet 3 kHz til 300 GHz, som omfatter de frekvenser som anvendes til <a href="/wiki/Radiokommunikation" class="mw-redirect" title="Radiokommunikation">radiokommunikationssignaler</a> eller <a href="/wiki/Radar" title="Radar">radarsignaler</a>.<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> Radiofrekvenser refererer sædvanligvis til <a href="/wiki/Elektriske_oscillationer" class="mw-redirect" title="Elektriske oscillationer">elektriske oscillationer</a> frem for <a href="/w/index.php?title=Mekaniske_oscillationer&action=edit&redlink=1" class="new" title="Mekaniske oscillationer (ikke skrevet endnu)">mekaniske oscillationer</a>. Mekaniske radiofrekvens systemer findes dog (se <a href="/w/index.php?title=Mekanisk_filter&action=edit&redlink=1" class="new" title="Mekanisk filter (ikke skrevet endnu)">mekanisk filter</a> og <a href="/w/index.php?title=RF_MEMS&action=edit&redlink=1" class="new" title="RF MEMS (ikke skrevet endnu)">RF MEMS</a>). </p><p>Selvom <i>radiofrekvens</i> er en benævnelse for oscillationshastighed, bliver termen "radiofrekvens" eller dens forkortelse "RF" anvendt som en synonym for <a href="/wiki/Radio" title="Radio">radio</a> – fx, til at beskrive anvendelsen af <a href="/wiki/Tr%C3%A5dl%C3%B8s_kommunikation" title="Trådløs kommunikation">trådløs kommunikation</a>, i modsætning til kommunikation via elektriske kabler. Fx: </p> <ul><li><a href="/wiki/Radiofrekvensidentifikation" class="mw-redirect" title="Radiofrekvensidentifikation">Radiofrekvensidentifikation</a></li> <li><a href="/w/index.php?title=ISO/IEC_14443&action=edit&redlink=1" class="new" title="ISO/IEC 14443 (ikke skrevet endnu)">ISO/IEC 14443</a>-2 <i>Radio frequency power and signal interface</i><sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup></li></ul> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="RF-strømmes_egenskaber"><span id="RF-str.C3.B8mmes_egenskaber"></span>RF-strømmes egenskaber</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Radiofrekvens&veaction=edit&section=1" title="Redigér afsnit: RF-strømmes egenskaber" class="mw-editsection-visualeditor"><span>redigér</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Radiofrekvens&action=edit&section=1" title="Edit section's source code: RF-strømmes egenskaber"><span>rediger kildetekst</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/Fil:Koaxialkabel.JPG" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/7/7f/Koaxialkabel.JPG/220px-Koaxialkabel.JPG" decoding="async" width="220" height="147" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/7/7f/Koaxialkabel.JPG/330px-Koaxialkabel.JPG 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/7/7f/Koaxialkabel.JPG/440px-Koaxialkabel.JPG 2x" data-file-width="2556" data-file-height="1711" /></a><figcaption><a href="/wiki/Koaksialkabel" title="Koaksialkabel">Koaksialkabel</a> (<a href="/wiki/Transmissionslinje" title="Transmissionslinje">transmissionslinje</a>) hvor størstedelen af isolatormediet er luft. Koaksialkablet er særlig egnet til store effekter i <a href="/wiki/UHF" title="UHF">UHF</a>-båndet til brug i f.eks. fjernsynsantennetårne pga. lavt tab. Radiofrekvensen løber/formidles mellem indersiden af yderste cirkulære kobberblik og ydersiden af inderste cirkulære kobberblik. Den inderste leder er hul, da <a href="/w/index.php?title=Str%C3%B8mfortr%C3%A6ngning&action=edit&redlink=1" class="new" title="Strømfortrængning (ikke skrevet endnu)">strømfortrængning</a> ved høje frekvenser næsten kun løber i overfladen af ledere. Mellem de to cirkulære ledere anvendes næsten udelukkende luft som isolator og lidt plastafstandsgivere.</figcaption></figure> <p><a href="/wiki/Elektriske_str%C3%B8mme" class="mw-redirect" title="Elektriske strømme">Elektriske strømme</a>, som oscillerer ved radiofrekvenser, har specielle egenskaber som ikke er fælles med <a href="/wiki/J%C3%A6vnstr%C3%B8m" title="Jævnstrøm">jævnstrøm</a> eller lavere frekvensers <a href="/wiki/Vekselstr%C3%B8m" title="Vekselstrøm">vekselstrøm</a>: </p> <ul><li><a href="/wiki/Radioantenne" title="Radioantenne">En RF-strøms energi kan stråle fra en leder og ud i rummet eller atmosfæren</a> som <a href="/wiki/Elektromagnetiske_b%C3%B8lger" class="mw-redirect" title="Elektromagnetiske bølger">elektromagnetiske bølger</a> (<a href="/wiki/Radiob%C3%B8lger" title="Radiobølger">radiobølger</a>); dette er grundlaget for radioteknologi. (de lavere frekvenser kan også udstråle, men det kræver meget lange ledere, som sjældent forekommer på planeten jorden)</li> <li>RF-strømme trænger ikke dybt ind i elektriske ledere, men løber tæt langs ledernes overflader; denne effekt kaldes <a href="/w/index.php?title=Str%C3%B8mfortr%C3%A6ngning&action=edit&redlink=1" class="new" title="Strømfortrængning (ikke skrevet endnu)">strømfortrængning</a>. (konsekvensen er at hule ledere er stort set ligeså effektive til at lede som massive ledere)</li> <li>RF-strømme som løber gennem kroppen er skadelige, men ofte giver de ikke en smertefuld følelse af <a href="/w/index.php?title=Elektrisk_st%C3%B8d&action=edit&redlink=1" class="new" title="Elektrisk stød (ikke skrevet endnu)">elektrisk stød</a>, som lavere frekvenser giver.<sup id="cite_ref-Curtis_3-0" class="reference"><a href="#cite_note-Curtis-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-Mieny_4-0" class="reference"><a href="#cite_note-Mieny-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> Dette er fordi at strømmen veksler retning for hurtig til at udløse en biologisk depolarisation af nervemembranerne. RF-strømme kan give alvorlige overfladiske forbrændinger kaldet <i>RF-forbrænding</i>. (Ét sted er RF-forbrænding en god ting; ved den medicinske proces <a href="/wiki/RF-ablation" class="mw-redirect" title="RF-ablation">RF-ablation</a>)</li> <li>RF-strømme kan let <a href="/wiki/Ionisering" title="Ionisering">ionisere</a> luft og skabe en ledende sti gennem denne (fx <a href="/wiki/Lyn" title="Lyn">lyn</a>). Denne egenskab bliver udnyttet af "højfrekvens" apparater som anvendes indenfor elektrisk <a href="/wiki/Lysbuesvejsning" class="mw-redirect" title="Lysbuesvejsning">lysbuesvejsning</a>, som anvender strømme med højere frekvenser end <a href="/wiki/Elnet" class="mw-redirect" title="Elnet">elnettets</a>.</li> <li>Andre egenskaber er muligheden for at se ud som at strømme gennem et isolerende materiale, som fx en <a href="/wiki/Kapacitor" class="mw-redirect" title="Kapacitor">kapacitors</a> <a href="/wiki/Dielektriske" class="mw-redirect" title="Dielektriske">dielektriske</a> isolator. Grunden til denne effekt er, at <a href="/wiki/Kapacitiv_reaktans" class="mw-redirect" title="Kapacitiv reaktans">kapacitiv reaktans</a> i et kredsløbs falder (for fastholdt <a href="/wiki/Kapacitans" title="Kapacitans">kapacitans</a>) med frekvensen.</li> <li>I modsætning til ovenstående, kan RF-strømme blive blokeret af en opspoling af en leder - faktisk kan en simpel vinding, bøjning eller bare en ret leder være nok for høje nok frekvenser. Grunden til denne effekt er den <a href="/wiki/Induktive_reaktans" class="mw-redirect" title="Induktive reaktans">induktive reaktans</a> af en <a href="/wiki/Elektrisk_spole" title="Elektrisk spole">elektrisk spole</a> stiger med frekvensen.</li> <li>Når RF-strømme leder af almindelige <a href="/wiki/Elektriske_kabler" class="mw-redirect" title="Elektriske kabler">elektriske kabler</a>, har RF-strømme en tendens til at reflektere fra ohmske diskontinuiteter i kablet såsom stik og stikovergange - og ledes tilbage nedad kablet til kilden, hvilket typisk giver <a href="/wiki/St%C3%A5ende_b%C3%B8lger" class="mw-redirect" title="Stående bølger">stående bølger</a>, som normalt er uønskede. Derfor formidles RF-strømme af specielle kabler kaldet <a href="/wiki/Transmissionslinje" title="Transmissionslinje">transmissionslinjer</a>.</li></ul> <div class="mw-heading mw-heading2"><h2 id="Radiokommunikation">Radiokommunikation</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Radiofrekvens&veaction=edit&section=2" title="Redigér afsnit: Radiokommunikation" class="mw-editsection-visualeditor"><span>redigér</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Radiofrekvens&action=edit&section=2" title="Edit section's source code: Radiokommunikation"><span>rediger kildetekst</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="detail"><span><span typeof="mw:File"><span title="Uddybende"><img alt="Uddybende" src="//upload.wikimedia.org/wikipedia/commons/thumb/6/61/Searchtool.svg/15px-Searchtool.svg.png" decoding="async" width="15" height="15" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/6/61/Searchtool.svg/23px-Searchtool.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/6/61/Searchtool.svg/30px-Searchtool.svg.png 2x" data-file-width="512" data-file-height="512" /></span></span> <span>Uddybende artikel: <a href="/wiki/Radiokommunikation" class="mw-redirect" title="Radiokommunikation">Radiokommunikation</a></span></span></div> <p>For at modtage radiosignaler anvendes en <a href="/wiki/Radioantenne" title="Radioantenne">radioantenne</a>. Men da en radioantenne vil "opsamle" tusinder af radiosignaler på en gang, er en (selektiv) <a href="/wiki/Radiomodtager" title="Radiomodtager">radiomodtager</a> nødvendig for at <i>tune ind</i> på en ønsket frekvens; mere præcist en ønsket <a href="/wiki/Radiokanal" title="Radiokanal">radiokanal</a>.<sup id="cite_ref-5" class="reference"><a href="#cite_note-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> I en radiomodtager "plukkes" det ønskede frekvensinterval i princippet ud ved at dæmpe alle andre frekvenser via en <a href="/w/index.php?title=Resonator&action=edit&redlink=1" class="new" title="Resonator (ikke skrevet endnu)">resonator</a>. I sin simpleste form kan en resonator udgøres af en <a href="/wiki/Kapacitor" class="mw-redirect" title="Kapacitor">kapacitor</a> og en <a href="/wiki/Elektrisk_spole" title="Elektrisk spole">elektrisk spole</a> som danner et <a href="/wiki/LC-kredsl%C3%B8b" class="mw-redirect" title="LC-kredsløb">LC-kredsløb</a>. Resonatoren dæmper alle andre oscillationer udenfor det ønskede frekvensinterval - og "resten" det ønskede frekvensinterval er nu tilbage. En anden metode at "plukke" et ønsket frekvensinterval ud er ved at digitalisere radiosignalet (<a href="/wiki/Diskretisering" class="mw-redirect" title="Diskretisering">diskretisering</a> og <a href="/wiki/Kvantisering" title="Kvantisering">kvantisering</a>). Herefter kan det ønsket frekvensinterval hentes ud via matematiske beregninger (<a href="/wiki/Digital_signalbehandling" title="Digital signalbehandling">digital signalbehandling</a>). Det er dét, der sker i <a href="/wiki/Softwaredefineret_radio" title="Softwaredefineret radio">softwaredefineret radio</a>. </p><p>Afstanden hvormed radiokommunikation er anvendelig afhænger meget af andre ting end bølgelængden, såsom sendereffekt, modtagerkvalitet, type, størrelse og højden af antenne over terræn og over havoverfladen, transmissionstype, støj og interferenssignaler. <a href="/w/index.php?title=Jordb%C3%B8lge&action=edit&redlink=1" class="new" title="Jordbølge (ikke skrevet endnu)">Jordbølger</a>, <a href="/w/index.php?title=Troposf%C3%A6risk_scatter&action=edit&redlink=1" class="new" title="Troposfærisk scatter (ikke skrevet endnu)">troposfærisk scatter</a> og <a href="/w/index.php?title=Himmelb%C3%B8lge&action=edit&redlink=1" class="new" title="Himmelbølge (ikke skrevet endnu)">himmelbølger</a> kan alle opnå større afstande end <a href="/w/index.php?title=Line-of-sight_radioudbredelse&action=edit&redlink=1" class="new" title="Line-of-sight radioudbredelse (ikke skrevet endnu)">line-of-sight radioudbredelse</a>. Studiet af <a href="/wiki/Radioudbredelse" title="Radioudbredelse">radioudbredelse</a> tillader estimering af anvendelige afstande for en given situation og tid på dagen. </p> <div class="mw-heading mw-heading2"><h2 id="Frekvens">Frekvens</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Radiofrekvens&veaction=edit&section=3" title="Redigér afsnit: Frekvens" class="mw-editsection-visualeditor"><span>redigér</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Radiofrekvens&action=edit&section=3" title="Edit section's source code: Frekvens"><span>rediger kildetekst</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="detail"><span><span typeof="mw:File"><span><img src="//upload.wikimedia.org/wikipedia/commons/thumb/2/2d/Nuvola_apps_download_manager2-70%25.svg/15px-Nuvola_apps_download_manager2-70%25.svg.png" decoding="async" width="15" height="15" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/2/2d/Nuvola_apps_download_manager2-70%25.svg/23px-Nuvola_apps_download_manager2-70%25.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/2/2d/Nuvola_apps_download_manager2-70%25.svg/30px-Nuvola_apps_download_manager2-70%25.svg.png 2x" data-file-width="60" data-file-height="60" /></span></span> <span>Hovedartikel: <a href="/wiki/Radiospektrum" class="mw-redirect" title="Radiospektrum">Radiospektrum</a>.</span></span></div> <p><br /> </p> <table class="wikitable"> <tbody><tr> <th><a href="/wiki/International_Telecommunication_Union" title="International Telecommunication Union">ITU</a> <a href="/wiki/Frekvensinterval" class="mw-redirect" title="Frekvensinterval">frekvensinterval</a>.<sup id="cite_ref-radiospektrum_ITU_6-0" class="reference"><a href="#cite_note-radiospektrum_ITU-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup><br />Lav grænse ikke med.<br />Høj grænse med.</th> <th>ITU <a href="/wiki/B%C3%B8lgel%C3%A6ngde" title="Bølgelængde">bølgelængdeinterval</a><br />i <a href="/wiki/Vakuum" title="Vakuum">vakuum</a>.<br />Høj grænse ikke med.<br />Lav grænse med.</th> <th>International<br />engelsk ITU frekvensbenævnelse</th> <th>International ITU<br />frekvensforkortelse</th> <th>ITU bånd</th> <th>Danske frekvensbenævnelser</th> <th>Danske bølgelængdebenævnelser<br />i vakuum<sup id="cite_ref-radiospektrum_OZ1986_12_7-0" class="reference"><a href="#cite_note-radiospektrum_OZ1986_12-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup> </th></tr> <tr> <td>3–30 kHz</td> <td>100–10 km</td> <td><a href="/wiki/Very_low_frequency" class="mw-redirect" title="Very low frequency">Very low frequency</a></td> <td>VLF</td> <td>4</td> <td></td> <td>Myriameterbølger </td></tr> <tr> <td>30–300 kHz</td> <td>10–1 km</td> <td><a href="/wiki/Lavfrekvens_(30_kHz_-_300_kHz)" class="mw-redirect" title="Lavfrekvens (30 kHz - 300 kHz)">Low frequency</a></td> <td>LF</td> <td>5</td> <td><a href="/wiki/Lavfrekvens_(30_kHz_-_300_kHz)" class="mw-redirect" title="Lavfrekvens (30 kHz - 300 kHz)">Lavfrekvens</a></td> <td>Kilometerbølger<br /><a href="/wiki/Langb%C3%B8lger" title="Langbølger">Langbølger</a> </td></tr> <tr> <td>300 kHz – 3 MHz</td> <td>1 km – 100 m</td> <td><a href="/wiki/Mellemfrekvens_(frekvensomr%C3%A5de)" class="mw-redirect" title="Mellemfrekvens (frekvensområde)">Medium frequency</a></td> <td>MF</td> <td>6</td> <td><a href="/wiki/Mellemfrekvens_(frekvensomr%C3%A5de)" class="mw-redirect" title="Mellemfrekvens (frekvensområde)">Mellemfrekvens</a></td> <td>Hectometerbølger<br /><a href="/wiki/Mellemb%C3%B8lger" title="Mellembølger">Mellembølger</a> </td></tr> <tr> <td>3–30 MHz</td> <td>100–10 m</td> <td><a href="/wiki/H%C3%B8jfrekvens_(3_MHz_-_30_MHz)" title="Højfrekvens (3 MHz - 30 MHz)">High frequency</a></td> <td>HF</td> <td>7</td> <td><a href="/wiki/H%C3%B8jfrekvens_(3_MHz_-_30_MHz)" title="Højfrekvens (3 MHz - 30 MHz)">Højfrekvens</a></td> <td>Decameterbølger<br /><a href="/wiki/Kortb%C3%B8lger" class="mw-redirect" title="Kortbølger">Kortbølger</a> </td></tr> <tr> <td>30–300 MHz</td> <td>10–1 m</td> <td><a href="/wiki/Very_high_frequency" class="mw-redirect" title="Very high frequency">Very high frequency</a></td> <td>VHF</td> <td>8</td> <td></td> <td>Meterbølger<br />Ultrakorte bølger </td></tr> <tr> <td>300 MHz – 3 GHz</td> <td>1 m – 10 cm</td> <td><a href="/wiki/Ultra_high_frequency" class="mw-redirect" title="Ultra high frequency">Ultra high frequency</a></td> <td>UHF</td> <td>9</td> <td></td> <td>Decimeterbølger (<a href="/wiki/Mikrob%C3%B8lger" class="mw-redirect" title="Mikrobølger">mikrobølger</a>) </td></tr> <tr> <td>3–30 GHz</td> <td>10–1 cm</td> <td><a href="/wiki/Super_high_frequency" class="mw-redirect" title="Super high frequency">Super high frequency</a></td> <td>SHF</td> <td>10</td> <td></td> <td>Centimeterbølger (mikrobølger) </td></tr> <tr> <td>30–300 GHz</td> <td>1 cm – 1 mm</td> <td><a href="/wiki/Extremely_high_frequency" class="mw-redirect" title="Extremely high frequency">Extremely high frequency</a></td> <td>EHF</td> <td>11</td> <td></td> <td>Millimeterbølger (mikrobølger) </td></tr> <tr> <td>300–3000 GHz</td> <td>1 mm – 0,1 mm</td> <td><a href="/wiki/Tremendously_high_frequency" class="mw-redirect" title="Tremendously high frequency">Tremendously high frequency</a></td> <td>THF<br />(kilde ikke ITU)</td> <td>12</td> <td></td> <td>Decimillimeterbølger<br />T-bølger </td></tr></tbody></table> <p><br /> </p> <div class="mw-heading mw-heading2"><h2 id="Se_også"><span id="Se_ogs.C3.A5"></span>Se også</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Radiofrekvens&veaction=edit&section=4" title="Redigér afsnit: Se også" class="mw-editsection-visualeditor"><span>redigér</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Radiofrekvens&action=edit&section=4" title="Edit section's source code: Se også"><span>rediger kildetekst</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/Amplitudemodulation" title="Amplitudemodulation">Amplitudemodulation</a></li> <li><a href="/w/index.php?title=Elektromagnetisk_interferens&action=edit&redlink=1" class="new" title="Elektromagnetisk interferens (ikke skrevet endnu)">Elektromagnetisk interferens</a></li> <li><a href="/wiki/Elektromagnetisk_str%C3%A5ling" title="Elektromagnetisk stråling">Elektromagnetisk stråling</a></li> <li><a href="/wiki/Elektromagnetisk_spektrum" class="mw-redirect" title="Elektromagnetisk spektrum">Elektromagnetisk spektrum</a></li> <li><a href="/w/index.php?title=EMF-m%C3%A5ling&action=edit&redlink=1" class="new" title="EMF-måling (ikke skrevet endnu)">EMF-måling</a></li> <li><a href="/w/index.php?title=Frekvensallokering&action=edit&redlink=1" class="new" title="Frekvensallokering (ikke skrevet endnu)">Frekvensallokering</a></li> <li><a href="/w/index.php?title=Frekvensb%C3%A5ndbredde&action=edit&redlink=1" class="new" title="Frekvensbåndbredde (ikke skrevet endnu)">Frekvensbåndbredde</a></li> <li><a href="/wiki/Frekvensmodulation" title="Frekvensmodulation">Frekvensmodulation</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="Kilder/referencer"><span id="Kilder.2Freferencer"></span>Kilder/referencer</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Radiofrekvens&veaction=edit&section=5" title="Redigér afsnit: Kilder/referencer" class="mw-editsection-visualeditor"><span>redigér</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Radiofrekvens&action=edit&section=5" title="Edit section's source code: Kilder/referencer"><span>rediger kildetekst</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r11780210">.mw-parser-output .reflist{font-size:90%;margin-bottom:0.5em;list-style-type:decimal}.mw-parser-output .reflist .references{font-size:100%;margin-bottom:0;list-style-type:inherit}.mw-parser-output .reflist-columns-2{column-width:30em}.mw-parser-output .reflist-columns-3{column-width:25em}.mw-parser-output .reflist-columns{margin-top:0.3em}.mw-parser-output .reflist-columns ol{margin-top:0}.mw-parser-output .reflist-columns li{page-break-inside:avoid;break-inside:avoid-column}.mw-parser-output .reflist-upper-alpha{list-style-type:upper-alpha}.mw-parser-output .reflist-upper-roman{list-style-type:upper-roman}.mw-parser-output .reflist-lower-alpha{list-style-type:lower-alpha}.mw-parser-output .reflist-lower-greek{list-style-type:lower-greek}.mw-parser-output .reflist-lower-roman{list-style-type:lower-roman}</style><div class="reflist"> <div class="mw-references-wrap"><ol class="references"> <li id="cite_note-1"><span class="mw-cite-backlink"><a href="#cite_ref-1">^</a></span> <span class="reference-text"> <style data-mw-deduplicate="TemplateStyles:r11752076">.mw-parser-output cite.citation{font-style:inherit;word-wrap:break-word}.mw-parser-output .citation q{quotes:"\"""\"""'""'"}.mw-parser-output .citation:target{background-color:rgba(0,127,255,0.133)}.mw-parser-output .id-lock-free a,.mw-parser-output .citation .cs1-lock-free a{background:linear-gradient(transparent,transparent),url("//upload.wikimedia.org/wikipedia/commons/6/65/Lock-green.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-limited a,.mw-parser-output .id-lock-registration a,.mw-parser-output .citation .cs1-lock-limited a,.mw-parser-output .citation .cs1-lock-registration a{background:linear-gradient(transparent,transparent),url("//upload.wikimedia.org/wikipedia/commons/d/d6/Lock-gray-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-subscription a,.mw-parser-output .citation .cs1-lock-subscription a{background:linear-gradient(transparent,transparent),url("//upload.wikimedia.org/wikipedia/commons/a/aa/Lock-red-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .cs1-ws-icon a{background:linear-gradient(transparent,transparent),url("//upload.wikimedia.org/wikipedia/commons/4/4c/Wikisource-logo.svg")right 0.1em center/12px no-repeat}.mw-parser-output .cs1-code{color:inherit;background:inherit;border:none;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;color:#d33}.mw-parser-output .cs1-visible-error{color:#d33}.mw-parser-output .cs1-maint{display:none;color:#3a3;margin-left:0.3em}.mw-parser-output .cs1-format{font-size:95%}.mw-parser-output .cs1-kern-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right{padding-right:0.2em}.mw-parser-output .citation .mw-selflink{font-weight:inherit}</style><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://www.merriam-webster.com/dictionary/radio%20frequency">"Definition of RADIO FREQUENCY"</a>. <i><a href="/w/index.php?title=Merriam-Webster&action=edit&redlink=1" class="new" title="Merriam-Webster (ikke skrevet endnu)">Merriam-Webster</a></i>. <a href="/wiki/Encyclop%C3%A6dia_Britannica" title="Encyclopædia Britannica">Encyclopædia Britannica</a>. n.d<span class="reference-accessdate">. Hentet 6. august 2015</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Merriam-Webster&rft.atitle=Definition+of+RADIO+FREQUENCY&rft.chron=n.d.&rft_id=http%3A%2F%2Fwww.merriam-webster.com%2Fdictionary%2Fradio%2520frequency&rfr_id=info%3Asid%2Fda.wikipedia.org%3ARadiofrekvens" class="Z3988"></span></span> </li> <li id="cite_note-2"><span class="mw-cite-backlink"><a href="#cite_ref-2">^</a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r11752076"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://www.iso.org/iso/iso_catalogue/catalogue_tc/catalogue_detail.htm?csnumber=28729">"ISO/IEC 14443-2:2001 Identification cards — Contactless integrated circuit(s) cards — Proximity cards — Part 2: Radio frequency power and signal interface"</a>. Iso.org. 2010-08-19<span class="reference-accessdate">. Hentet <span class="nowrap">2011-11-08</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=ISO%2FIEC+14443-2%3A2001+Identification+cards+%E2%80%94+Contactless+integrated+circuit%28s%29+cards+%E2%80%94+Proximity+cards+%E2%80%94+Part+2%3A+Radio+frequency+power+and+signal+interface&rft.pub=Iso.org&rft.date=2010-08-19&rft_id=http%3A%2F%2Fwww.iso.org%2Fiso%2Fiso_catalogue%2Fcatalogue_tc%2Fcatalogue_detail.htm%3Fcsnumber%3D28729&rfr_id=info%3Asid%2Fda.wikipedia.org%3ARadiofrekvens" class="Z3988"></span></span> </li> <li id="cite_note-Curtis-3"><span class="mw-cite-backlink"><a href="#cite_ref-Curtis_3-0">^</a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r11752076"><cite id="CITEREFCurtis1916" class="citation book cs1">Curtis, Thomas Stanley (1916). <a rel="nofollow" class="external text" href="https://books.google.com/books?id=GKA3AAAAMAAJ&pg=PA6&lpg=PA6&dq=%22electric+shock%22+pain+%22high+frequency#v=onepage&q=%22electric%20shock%22%20pain"><i>High Frequency Apparatus: Its Construction and Practical Application</i></a>. USA: Everyday Mechanics Company. s. 6.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=High+Frequency+Apparatus%3A+Its+Construction+and+Practical+Application&rft.place=USA&rft.pages=6&rft.pub=Everyday+Mechanics+Company&rft.date=1916&rft.aulast=Curtis&rft.aufirst=Thomas+Stanley&rft_id=https%3A%2F%2Fbooks.google.com%2Fbooks%3Fid%3DGKA3AAAAMAAJ%26pg%3DPA6%26lpg%3DPA6%26dq%3D%2522electric%2Bshock%2522%2Bpain%2B%2522high%2Bfrequency%23v%3Donepage%26q%3D%2522electric%2520shock%2522%2520pain&rfr_id=info%3Asid%2Fda.wikipedia.org%3ARadiofrekvens" class="Z3988"></span></span> </li> <li id="cite_note-Mieny-4"><span class="mw-cite-backlink"><a href="#cite_ref-Mieny_4-0">^</a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r11752076"><cite id="CITEREFMieny2003" class="citation book cs1">Mieny, C. J. (2003). <a rel="nofollow" class="external text" href="https://books.google.com/books?id=TSxQ6ZzovgkC&pg=PA136&lpg=PA136&dq=%22electric+shock%22+pain+%22high+frequency#v=onepage&q=%22electric%20shock%22%20pain%20%22high%20frequency"><i>Principles of Surgical Patient Care</i></a> (2nd udgave). New Africa Books. s. 136. <a href="/wiki/Internationalt_Standardbognummer" title="Internationalt Standardbognummer">ISBN</a> <a href="/wiki/Speciel:ISBN-s%C3%B8gning/9781869280055" title="Speciel:ISBN-søgning/9781869280055"><bdi>9781869280055</bdi></a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=Principles+of+Surgical+Patient+Care&rft.pages=136&rft.edition=2nd&rft.pub=New+Africa+Books&rft.date=2003&rft.isbn=9781869280055&rft.aulast=Mieny&rft.aufirst=C.+J.&rft_id=https%3A%2F%2Fbooks.google.com%2Fbooks%3Fid%3DTSxQ6ZzovgkC%26pg%3DPA136%26lpg%3DPA136%26dq%3D%2522electric%2Bshock%2522%2Bpain%2B%2522high%2Bfrequency%23v%3Donepage%26q%3D%2522electric%2520shock%2522%2520pain%2520%2522high%2520frequency&rfr_id=info%3Asid%2Fda.wikipedia.org%3ARadiofrekvens" class="Z3988"></span></span> </li> <li id="cite_note-5"><span class="mw-cite-backlink"><a href="#cite_ref-5">^</a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r11752076"><cite id="CITEREFBrain2000" class="citation web cs1">Brain, Marshall (2000-12-07). <a rel="nofollow" class="external text" href="http://electronics.howstuffworks.com/radio8.htm">"How Radio Works"</a>. HowStuffWorks.com<span class="reference-accessdate">. Hentet <span class="nowrap">2009-09-11</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=How+Radio+Works&rft.pub=HowStuffWorks.com&rft.date=2000-12-07&rft.aulast=Brain&rft.aufirst=Marshall&rft_id=http%3A%2F%2Felectronics.howstuffworks.com%2Fradio8.htm&rfr_id=info%3Asid%2Fda.wikipedia.org%3ARadiofrekvens" class="Z3988"></span></span> </li> <li id="cite_note-radiospektrum_ITU-6"><span class="mw-cite-backlink"><a href="#cite_ref-radiospektrum_ITU_6-0">^</a></span> <span class="reference-text"><a rel="nofollow" class="external text" href="https://www.itu.int/dms_pub/itu-r/opb/reg/R-REG-RR-2016-ZPF-E.zip">itu.int: Radio Regulations, edition of 2016; RR2016Vol-I_EA5.pdf</a> CHAPTER I Terminology and technical characteristics. Section I – Frequency and wavelength bands. 2.1. side 27. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20190406090112/https://www.itu.int/dms_pub/itu-r/opb/reg/R-REG-RR-2016-ZPF-E.zip">backup</a>, <a rel="nofollow" class="external text" href="https://www.itu.int/pub/R-REG-RR">hovedside</a></span> </li> <li id="cite_note-radiospektrum_OZ1986_12-7"><span class="mw-cite-backlink"><a href="#cite_ref-radiospektrum_OZ1986_12_7-0">^</a></span> <span class="reference-text"><a rel="nofollow" class="external text" href="https://web.archive.org/web/20190406084758/https://www.edr.dk/wp-content/uploads/magazine/OZ/1968/OZ.1968.12.pdf">EDR OZ 1968 nr 12</a> side 431.</span> </li> </ol></div></div> <div class="mw-heading mw-heading2"><h2 id="Eksterne_henvisninger">Eksterne henvisninger</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Radiofrekvens&veaction=edit&section=6" title="Redigér afsnit: Eksterne henvisninger" class="mw-editsection-visualeditor"><span>redigér</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Radiofrekvens&action=edit&section=6" title="Edit section's source code: Eksterne henvisninger"><span>rediger kildetekst</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a rel="nofollow" class="external text" href="http://www.vlf.it/frequency/bands.html">Definition of frequency bands (VLF, ELF … etc.) IK1QFK Home Page (vlf.it)</a></li> <li><a rel="nofollow" class="external text" href="http://www.sengpielaudio.com/calculator-wavelength.htm">Radio, light, and sound waves, conversion between wavelength and frequency</a> <a rel="nofollow" class="external text" href="https://web.archive.org/web/20120311050010/http://www.sengpielaudio.com/calculator-wavelength.htm">Arkiveret</a> 11. marts 2012 hos <a href="/wiki/Wayback_Machine" title="Wayback Machine">Wayback Machine</a></li> <li><a rel="nofollow" class="external text" href="https://www.sunmantechnology.com/resources_gls_rfts.html">RF Terms Glossary</a> <a rel="nofollow" class="external text" href="https://web.archive.org/web/20080820005518/http://www.sunmantechnology.com/resources_gls_rfts.html">Arkiveret</a> 20. august 2008 hos <a href="/wiki/Wayback_Machine" title="Wayback Machine">Wayback Machine</a></li></ul> <div class="navbox-styles"><style data-mw-deduplicate="TemplateStyles:r11759279">.mw-parser-output .hlist dl,.mw-parser-output .hlist ol,.mw-parser-output .hlist ul{margin:0;padding:0}.mw-parser-output .hlist dd,.mw-parser-output .hlist dt,.mw-parser-output .hlist li{margin:0;display:inline}.mw-parser-output .hlist.inline,.mw-parser-output .hlist.inline dl,.mw-parser-output .hlist.inline ol,.mw-parser-output .hlist.inline ul,.mw-parser-output .hlist dl dl,.mw-parser-output .hlist dl ol,.mw-parser-output .hlist dl ul,.mw-parser-output .hlist ol dl,.mw-parser-output .hlist ol ol,.mw-parser-output .hlist ol ul,.mw-parser-output .hlist ul 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.navbox-abovebelow,.mw-parser-output .navbox-group,.mw-parser-output .navbox-subgroup .navbox-title{background-color:#ddf}.mw-parser-output .navbox-subgroup .navbox-group,.mw-parser-output .navbox-subgroup .navbox-abovebelow{background-color:#e6e6ff}.mw-parser-output .navbox-even{background-color:#f7f7f7}.mw-parser-output .navbox-odd{background-color:transparent}.mw-parser-output .navbox .hlist td dl,.mw-parser-output .navbox .hlist td ol,.mw-parser-output .navbox .hlist td ul,.mw-parser-output .navbox td.hlist dl,.mw-parser-output .navbox td.hlist ol,.mw-parser-output .navbox td.hlist ul{padding:0.125em 0}.mw-parser-output .navbox .navbar{display:block;font-size:100%}.mw-parser-output .navbox-title .navbar{float:left;text-align:left;margin-right:0.5em}</style></div><div role="navigation" class="navbox" aria-labelledby="Det_elektromagnetiske_spektrum_(lave_til_høje_frekvenser)" style="padding:3px"><table class="nowraplinks mw-collapsible autocollapse navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r11759279"><style data-mw-deduplicate="TemplateStyles:r11746895">.mw-parser-output .navbar{display:inline;font-size:88%;font-weight:normal}.mw-parser-output .navbar-collapse{float:left;text-align:left}.mw-parser-output .navbar-boxtext{word-spacing:0}.mw-parser-output .navbar ul{display:inline-block;white-space:nowrap;line-height:inherit}.mw-parser-output .navbar-brackets::before{margin-right:-0.125em;content:"[ "}.mw-parser-output .navbar-brackets::after{margin-left:-0.125em;content:" ]"}.mw-parser-output .navbar li{word-spacing:-0.125em}.mw-parser-output .navbar a>span,.mw-parser-output .navbar a>abbr{text-decoration:inherit}.mw-parser-output .navbar-mini abbr{font-variant:small-caps;border-bottom:none;text-decoration:none;cursor:inherit}.mw-parser-output .navbar-ct-full{font-size:114%;margin:0 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style="font-size:114%;margin:0 4em">Det <a href="/wiki/Elektromagnetisk_spektrum" class="mw-redirect" title="Elektromagnetisk spektrum">elektromagnetiske spektrum</a> (lave til høje frekvenser)</div></th></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Lavfrekvens_(3_Hz_-_30_kHz)" class="mw-redirect" title="Lavfrekvens (3 Hz - 30 kHz)">Lavfrekvens</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Extremely_Low_Frequency" title="Extremely Low Frequency">ELF</a></li> <li><a href="/wiki/SLF" class="mw-redirect" title="SLF">SLF</a></li> <li><a href="/wiki/ULF" title="ULF">ULF</a></li> <li><a href="/wiki/VLF" title="VLF">VLF</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Radiob%C3%B8lge" class="mw-redirect" title="Radiobølge">Radiobølger</a> (omfattet af <a href="/wiki/H%C3%B8jfrekvens_(radiofrekvens)" class="mw-redirect" title="Højfrekvens (radiofrekvens)">højfrekvens</a>)</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Langb%C3%B8lger" title="Langbølger">LF</a> (<a href="/wiki/Langb%C3%B8lgeb%C3%A5ndet" title="Langbølgebåndet">Langbølgebåndet</a>)</li> <li><a href="/wiki/Mellemb%C3%B8lger" title="Mellembølger">MF</a> (<a href="/wiki/Mellemb%C3%B8lgeb%C3%A5ndet" title="Mellembølgebåndet">Mellembølgebåndet</a>)</li> <li><a href="/wiki/Kortb%C3%B8lgeb%C3%A5ndet" class="mw-redirect" title="Kortbølgebåndet">Kortbølgebåndet</a> (<a href="/wiki/H%C3%B8jfrekvens_(3_MHz_-_30_MHz)" title="Højfrekvens (3 MHz - 30 MHz)">HF</a>)</li> <li><a href="/wiki/VHF" title="VHF">VHF</a> (<a href="/wiki/TV_via_VHF_b%C3%A5nd_I" class="mw-redirect" title="TV via VHF bånd I">TV via VHF bånd I</a>, <a href="/wiki/FM_via_VHF_b%C3%A5nd_II" title="FM via VHF bånd II">FM via VHF bånd II</a>, <a href="/wiki/DAB_via_VHF_b%C3%A5nd_III" class="mw-redirect" title="DAB via VHF bånd III">DAB via VHF bånd III</a>, <a href="/wiki/TV_via_VHF_b%C3%A5nd_III" class="mw-redirect" title="TV via VHF bånd III">TV via VHF bånd III</a>)</li> <li><a href="/wiki/UHF" title="UHF">UHF</a> (<a href="/wiki/TV_via_UHF_b%C3%A5nd_V" class="mw-redirect" title="TV via UHF bånd V">TV via UHF bånd V</a>, <a href="/wiki/TV_via_UHF_b%C3%A5nd_IV" class="mw-redirect" title="TV via UHF bånd IV">TV via UHF bånd IV</a>)</li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Mikrob%C3%B8lge" title="Mikrobølge">Mikrobølger</a> (omfattet af <a href="/wiki/H%C3%B8jfrekvens_(radiofrekvens)" class="mw-redirect" title="Højfrekvens (radiofrekvens)">højfrekvens</a>)</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/SHF_(elektromagnetiske_spektrum)" title="SHF (elektromagnetiske spektrum)">SHF</a> (<a href="/wiki/Direct_broadcast_satellite" title="Direct broadcast satellite">DBS</a>)</li> <li><a href="/wiki/EHF_(elektromagnetiske_spektrum)" title="EHF (elektromagnetiske spektrum)">EHF</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Terahertz_str%C3%A5ling" title="Terahertz stråling">Terahertz stråling</a></th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Terahertz_str%C3%A5ling" title="Terahertz stråling">THF</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Infrar%C3%B8d_str%C3%A5ling" title="Infrarød stråling">Infrarød stråling</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/FIR_(str%C3%A5ling)" class="mw-redirect" title="FIR (stråling)">FIR</a></li> <li><a href="/wiki/IIR_(str%C3%A5ling)" class="mw-redirect" title="IIR (stråling)">IIR</a></li> <li><a href="/wiki/MIR_(str%C3%A5ling)" class="mw-redirect" title="MIR (stråling)">MIR</a></li> <li><a href="/wiki/NIR" class="mw-redirect" title="NIR">NIR</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Synlige_spektrum" title="Synlige spektrum">Synlige spektrum</a></th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/R%C3%B8d" title="Rød">Rød</a></li> <li><a href="/wiki/Orange" title="Orange">Orange</a></li> <li><a href="/wiki/Gul" title="Gul">Gul</a></li> <li><a href="/wiki/Gr%C3%B8n" title="Grøn">Grøn</a></li> <li><a href="/wiki/Bl%C3%A5" title="Blå">Blå</a></li> <li><a href="/wiki/Violet" title="Violet">Violet</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/UV-str%C3%A5ling" class="mw-redirect" title="UV-stråling">UV-stråling</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/NUV" class="mw-redirect" title="NUV">NUV</a></li> <li><a href="/wiki/EUV" class="mw-redirect" title="EUV">EUV</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/R%C3%B8ntgenstr%C3%A5ling" title="Røntgenstråling">Røntgenstråling</a></th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Bl%C3%B8d_r%C3%B8ntgenstr%C3%A5ling" class="mw-redirect" title="Blød røntgenstråling">SX</a></li> <li><a href="/wiki/H%C3%A5rd_r%C3%B8ntgenstr%C3%A5ling" class="mw-redirect" title="Hård røntgenstråling">HX</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Gammastr%C3%A5ling" title="Gammastråling">Gammastråling</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Gammastr%C3%A5ling" title="Gammastråling">γ</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Relaterede emner</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Sollys" title="Sollys">Sollys</a></li> <li><a href="/wiki/Termisk_energi" title="Termisk energi">Termisk energi</a></li> <li><a href="/wiki/Fotosyntese" title="Fotosyntese">Fotosyntese</a></li> <li><a href="/wiki/Solenergi" title="Solenergi">Solenergi</a></li> <li><a href="/wiki/Solkraft" title="Solkraft">Solkraft</a></li> <li><a href="/wiki/Solvarme" class="mw-redirect" title="Solvarme">Solvarme</a></li> <li><a href="/wiki/Solen" title="Solen">Solen</a></li> <li><a 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