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class="mw-page-title-main">球面度</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="去睇另一種語文嘅文章。有71種語言版本。" > <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-71" 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">71種語言</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/Steradiaal" title="Steradiaal – 南非荷蘭文" lang="af" hreflang="af" data-title="Steradiaal" data-language-autonym="Afrikaans" data-language-local-name="南非荷蘭文" 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/%D8%B3%D8%AA%D8%B1%D8%A7%D8%AF%D9%8A%D8%A7%D9%86" title="ستراديان – 阿拉伯文" lang="ar" hreflang="ar" data-title="ستراديان" data-language-autonym="العربية" data-language-local-name="阿拉伯文" 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/Estereorradi%C3%A1n" title="Estereorradián – 阿斯圖里亞文" lang="ast" hreflang="ast" data-title="Estereorradián" data-language-autonym="Asturianu" data-language-local-name="阿斯圖里亞文" class="interlanguage-link-target"><span>Asturianu</span></a></li><li class="interlanguage-link interwiki-be mw-list-item"><a href="https://be.wikipedia.org/wiki/%D0%A1%D1%82%D1%8D%D1%80%D0%B0%D0%B4%D1%8B%D1%8F%D0%BD" title="Стэрадыян – 白俄羅斯文" lang="be" hreflang="be" data-title="Стэрадыян" data-language-autonym="Беларуская" data-language-local-name="白俄羅斯文" class="interlanguage-link-target"><span>Беларуская</span></a></li><li class="interlanguage-link interwiki-be-x-old mw-list-item"><a href="https://be-tarask.wikipedia.org/wiki/%D0%A1%D1%82%D1%8D%D1%80%D0%B0%D0%B4%D1%8B%D1%8F%D0%BD" title="Стэрадыян – Belarusian (Taraškievica orthography)" lang="be-tarask" hreflang="be-tarask" data-title="Стэрадыян" data-language-autonym="Беларуская (тарашкевіца)" data-language-local-name="Belarusian (Taraškievica orthography)" class="interlanguage-link-target"><span>Беларуская (тарашкевіца)</span></a></li><li class="interlanguage-link interwiki-bg mw-list-item"><a href="https://bg.wikipedia.org/wiki/%D0%A1%D1%82%D0%B5%D1%80%D0%B0%D0%B4%D0%B8%D0%B0%D0%BD" title="Стерадиан – 保加利亞文" lang="bg" hreflang="bg" data-title="Стерадиан" data-language-autonym="Български" data-language-local-name="保加利亞文" 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%B8%E0%A7%8D%E0%A6%9F%E0%A7%87%E0%A6%B0%E0%A7%87%E0%A6%A1%E0%A6%BF%E0%A6%AF%E0%A6%BC%E0%A6%BE%E0%A6%A8" title="স্টেরেডিয়ান – 孟加拉文" lang="bn" hreflang="bn" data-title="স্টেরেডিয়ান" data-language-autonym="বাংলা" data-language-local-name="孟加拉文" class="interlanguage-link-target"><span>বাংলা</span></a></li><li class="interlanguage-link interwiki-bo mw-list-item"><a href="https://bo.wikipedia.org/wiki/%E0%BD%9F%E0%BE%B3%E0%BD%B4%E0%BD%98%E0%BC%8B%E0%BD%84%E0%BD%BC%E0%BD%A6%E0%BC%8B%E0%BD%9A%E0%BD%91%E0%BC%8D" title="ཟླུམ་ངོས་ཚད། – 藏文" lang="bo" hreflang="bo" data-title="ཟླུམ་ངོས་ཚད།" data-language-autonym="བོད་ཡིག" data-language-local-name="藏文" class="interlanguage-link-target"><span>བོད་ཡིག</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/Estereoradian" title="Estereoradian – 加泰羅尼亞文" lang="ca" hreflang="ca" data-title="Estereoradian" data-language-autonym="Català" data-language-local-name="加泰羅尼亞文" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-ckb mw-list-item"><a href="https://ckb.wikipedia.org/wiki/%D8%B3%D8%AA%D8%B1%D8%A7%D8%AF%DB%8C%D8%A7%D9%86" title="سترادیان – 索拉尼庫爾德文" lang="ckb" hreflang="ckb" data-title="سترادیان" data-language-autonym="کوردی" data-language-local-name="索拉尼庫爾德文" class="interlanguage-link-target"><span>کوردی</span></a></li><li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikipedia.org/wiki/Steradi%C3%A1n" title="Steradián – 捷克文" lang="cs" hreflang="cs" data-title="Steradián" data-language-autonym="Čeština" data-language-local-name="捷克文" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-cv mw-list-item"><a href="https://cv.wikipedia.org/wiki/%D0%A1%D1%82%D0%B5%D1%80%D0%B0%D0%B4%D0%B8%D0%B0%D0%BD" title="Стерадиан – 楚瓦什文" lang="cv" hreflang="cv" data-title="Стерадиан" data-language-autonym="Чӑвашла" data-language-local-name="楚瓦什文" class="interlanguage-link-target"><span>Чӑвашла</span></a></li><li class="interlanguage-link interwiki-cy mw-list-item"><a href="https://cy.wikipedia.org/wiki/Steradian" title="Steradian – 威爾斯文" lang="cy" hreflang="cy" data-title="Steradian" data-language-autonym="Cymraeg" data-language-local-name="威爾斯文" class="interlanguage-link-target"><span>Cymraeg</span></a></li><li class="interlanguage-link interwiki-da mw-list-item"><a href="https://da.wikipedia.org/wiki/Steradian" title="Steradian – 丹麥文" lang="da" hreflang="da" data-title="Steradian" data-language-autonym="Dansk" data-language-local-name="丹麥文" class="interlanguage-link-target"><span>Dansk</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Steradiant" title="Steradiant – 德文" lang="de" hreflang="de" data-title="Steradiant" data-language-autonym="Deutsch" data-language-local-name="德文" 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%A3%CF%84%CE%B5%CF%81%CE%B1%CE%BA%CF%84%CE%AF%CE%BD%CE%B9%CE%BF" title="Στερακτίνιο – 希臘文" lang="el" hreflang="el" data-title="Στερακτίνιο" data-language-autonym="Ελληνικά" data-language-local-name="希臘文" 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/Steradian" title="Steradian – 英文" lang="en" hreflang="en" data-title="Steradian" data-language-autonym="English" data-language-local-name="英文" 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/Steradiano" title="Steradiano – 世界文" lang="eo" hreflang="eo" data-title="Steradiano" data-language-autonym="Esperanto" data-language-local-name="世界文" 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/Estereorradi%C3%A1n" title="Estereorradián – 西班牙文" lang="es" hreflang="es" data-title="Estereorradián" data-language-autonym="Español" data-language-local-name="西班牙文" 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/Steradiaan" title="Steradiaan – 愛沙尼亞文" lang="et" hreflang="et" data-title="Steradiaan" data-language-autonym="Eesti" data-language-local-name="愛沙尼亞文" class="interlanguage-link-target"><span>Eesti</span></a></li><li class="interlanguage-link interwiki-eu mw-list-item"><a href="https://eu.wikipedia.org/wiki/Estereorradian" title="Estereorradian – 巴斯克文" lang="eu" hreflang="eu" data-title="Estereorradian" data-language-autonym="Euskara" data-language-local-name="巴斯克文" class="interlanguage-link-target"><span>Euskara</span></a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/%D8%A7%D8%B3%D8%AA%D8%B1%D8%A7%D8%AF%DB%8C%D8%A7%D9%86" title="استرادیان – 波斯文" lang="fa" hreflang="fa" data-title="استرادیان" data-language-autonym="فارسی" data-language-local-name="波斯文" 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/Steradiaani" title="Steradiaani – 芬蘭文" lang="fi" hreflang="fi" data-title="Steradiaani" data-language-autonym="Suomi" data-language-local-name="芬蘭文" 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/St%C3%A9radian" title="Stéradian – 法文" lang="fr" hreflang="fr" data-title="Stéradian" data-language-autonym="Français" data-language-local-name="法文" 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/Stearaidian" title="Stearaidian – 愛爾蘭文" lang="ga" hreflang="ga" data-title="Stearaidian" data-language-autonym="Gaeilge" data-language-local-name="愛爾蘭文" class="interlanguage-link-target"><span>Gaeilge</span></a></li><li class="interlanguage-link interwiki-gl mw-list-item"><a href="https://gl.wikipedia.org/wiki/Estereorradi%C3%A1n" title="Estereorradián – 加里西亞文" lang="gl" hreflang="gl" data-title="Estereorradián" data-language-autonym="Galego" data-language-local-name="加里西亞文" class="interlanguage-link-target"><span>Galego</span></a></li><li class="interlanguage-link interwiki-he mw-list-item"><a href="https://he.wikipedia.org/wiki/%D7%A1%D7%98%D7%A8%D7%93%D7%99%D7%90%D7%9F" title="סטרדיאן – 希伯來文" lang="he" hreflang="he" data-title="סטרדיאן" data-language-autonym="עברית" data-language-local-name="希伯來文" 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%B8%E0%A5%8D%E0%A4%9F%E0%A5%87%E0%A4%B0%E0%A5%87%E0%A4%A1%E0%A4%BF%E0%A4%AF%E0%A4%A8" title="स्टेरेडियन – 北印度文" lang="hi" hreflang="hi" data-title="स्टेरेडियन" data-language-autonym="हिन्दी" data-language-local-name="北印度文" 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/Steradijan" title="Steradijan – 克羅埃西亞文" lang="hr" hreflang="hr" data-title="Steradijan" data-language-autonym="Hrvatski" data-language-local-name="克羅埃西亞文" 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/Szteradi%C3%A1n" title="Szteradián – 匈牙利文" lang="hu" hreflang="hu" data-title="Szteradián" data-language-autonym="Magyar" data-language-local-name="匈牙利文" class="interlanguage-link-target"><span>Magyar</span></a></li><li class="interlanguage-link interwiki-hy mw-list-item"><a href="https://hy.wikipedia.org/wiki/%D5%8D%D5%BF%D5%A5%D5%BC%D5%A1%D5%A4%D5%AB%D5%A1%D5%B6" title="Ստեռադիան – 亞美尼亞文" lang="hy" hreflang="hy" data-title="Ստեռադիան" data-language-autonym="Հայերեն" data-language-local-name="亞美尼亞文" class="interlanguage-link-target"><span>Հայերեն</span></a></li><li class="interlanguage-link interwiki-ia mw-list-item"><a href="https://ia.wikipedia.org/wiki/Steradiano" title="Steradiano – 國際文" lang="ia" hreflang="ia" data-title="Steradiano" data-language-autonym="Interlingua" data-language-local-name="國際文" 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/Steradian" title="Steradian – 印尼文" lang="id" hreflang="id" data-title="Steradian" data-language-autonym="Bahasa Indonesia" data-language-local-name="印尼文" 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/Steradiante" title="Steradiante – 義大利文" lang="it" hreflang="it" data-title="Steradiante" data-language-autonym="Italiano" data-language-local-name="義大利文" 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/%E3%82%B9%E3%83%86%E3%83%A9%E3%82%B8%E3%82%A2%E3%83%B3" title="ステラジアン – 日文" lang="ja" hreflang="ja" data-title="ステラジアン" data-language-autonym="日本語" data-language-local-name="日文" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-ka mw-list-item"><a href="https://ka.wikipedia.org/wiki/%E1%83%A1%E1%83%A2%E1%83%94%E1%83%A0%E1%83%90%E1%83%93%E1%83%98%E1%83%90%E1%83%9C%E1%83%98" title="სტერადიანი – 喬治亞文" lang="ka" hreflang="ka" data-title="სტერადიანი" data-language-autonym="ქართული" data-language-local-name="喬治亞文" 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%A1%D1%82%D0%B5%D1%80%D0%B0%D0%B4%D0%B8%D0%B0%D0%BD" title="Стерадиан – 哈薩克文" lang="kk" hreflang="kk" data-title="Стерадиан" data-language-autonym="Қазақша" data-language-local-name="哈薩克文" 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/%EC%8A%A4%ED%85%8C%EB%9D%BC%EB%94%94%EC%95%88" title="스테라디안 – 韓文" lang="ko" hreflang="ko" data-title="스테라디안" data-language-autonym="한국어" data-language-local-name="韓文" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-lb mw-list-item"><a href="https://lb.wikipedia.org/wiki/Steradiant" title="Steradiant – 盧森堡文" lang="lb" hreflang="lb" data-title="Steradiant" data-language-autonym="Lëtzebuergesch" data-language-local-name="盧森堡文" class="interlanguage-link-target"><span>Lëtzebuergesch</span></a></li><li class="interlanguage-link interwiki-lt mw-list-item"><a href="https://lt.wikipedia.org/wiki/Steradianas" title="Steradianas – 立陶宛文" lang="lt" hreflang="lt" data-title="Steradianas" data-language-autonym="Lietuvių" data-language-local-name="立陶宛文" class="interlanguage-link-target"><span>Lietuvių</span></a></li><li class="interlanguage-link interwiki-lv mw-list-item"><a href="https://lv.wikipedia.org/wiki/Steradi%C4%81ns" title="Steradiāns – 拉脫維亞文" lang="lv" hreflang="lv" data-title="Steradiāns" data-language-autonym="Latviešu" data-language-local-name="拉脫維亞文" class="interlanguage-link-target"><span>Latviešu</span></a></li><li class="interlanguage-link interwiki-mk mw-list-item"><a href="https://mk.wikipedia.org/wiki/%D0%A1%D1%82%D0%B5%D1%80%D0%B0%D0%B4%D0%B8%D1%98%D0%B0%D0%BD" title="Стерадијан – 馬其頓文" lang="mk" hreflang="mk" data-title="Стерадијан" data-language-autonym="Македонски" data-language-local-name="馬其頓文" class="interlanguage-link-target"><span>Македонски</span></a></li><li class="interlanguage-link interwiki-ml mw-list-item"><a href="https://ml.wikipedia.org/wiki/%E0%B4%B8%E0%B5%8D%E0%B4%B1%E0%B5%8D%E0%B4%B1%E0%B5%86%E0%B4%B1%E0%B4%BE%E0%B4%A1%E0%B4%BF%E0%B4%AF%E0%B5%BB" title="സ്റ്റെറാഡിയൻ – 馬來亞拉姆文" lang="ml" hreflang="ml" data-title="സ്റ്റെറാഡിയൻ" data-language-autonym="മലയാളം" data-language-local-name="馬來亞拉姆文" class="interlanguage-link-target"><span>മലയാളം</span></a></li><li class="interlanguage-link interwiki-mn mw-list-item"><a href="https://mn.wikipedia.org/wiki/%D0%A1%D1%82%D0%B5%D1%80%D0%B0%D0%B4%D0%B8%D0%B0%D0%BD" title="Стерадиан – 蒙古文" lang="mn" hreflang="mn" data-title="Стерадиан" data-language-autonym="Монгол" data-language-local-name="蒙古文" class="interlanguage-link-target"><span>Монгол</span></a></li><li class="interlanguage-link interwiki-ms mw-list-item"><a href="https://ms.wikipedia.org/wiki/Steradian" title="Steradian – 馬來文" lang="ms" hreflang="ms" data-title="Steradian" data-language-autonym="Bahasa Melayu" data-language-local-name="馬來文" 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/Steradiaal" title="Steradiaal – 荷蘭文" lang="nl" hreflang="nl" data-title="Steradiaal" data-language-autonym="Nederlands" data-language-local-name="荷蘭文" 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/Steradian" title="Steradian – 耐諾斯克挪威文" lang="nn" hreflang="nn" data-title="Steradian" data-language-autonym="Norsk nynorsk" data-language-local-name="耐諾斯克挪威文" 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/Steradian" title="Steradian – 巴克摩挪威文" lang="nb" hreflang="nb" data-title="Steradian" data-language-autonym="Norsk bokmål" data-language-local-name="巴克摩挪威文" class="interlanguage-link-target"><span>Norsk bokmål</span></a></li><li class="interlanguage-link interwiki-oc mw-list-item"><a href="https://oc.wikipedia.org/wiki/Estereoradian" title="Estereoradian – 奧克西坦文" lang="oc" hreflang="oc" data-title="Estereoradian" data-language-autonym="Occitan" data-language-local-name="奧克西坦文" class="interlanguage-link-target"><span>Occitan</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Steradian" title="Steradian – 波蘭文" lang="pl" hreflang="pl" data-title="Steradian" data-language-autonym="Polski" data-language-local-name="波蘭文" 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/Sterajant" title="Sterajant – 皮埃蒙特文" lang="pms" hreflang="pms" data-title="Sterajant" data-language-autonym="Piemontèis" data-language-local-name="皮埃蒙特文" 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/Esferorradiano" title="Esferorradiano – 葡萄牙文" lang="pt" hreflang="pt" data-title="Esferorradiano" data-language-autonym="Português" data-language-local-name="葡萄牙文" 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/Steradian" title="Steradian – 羅馬尼亞文" lang="ro" hreflang="ro" data-title="Steradian" data-language-autonym="Română" data-language-local-name="羅馬尼亞文" 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%A1%D1%82%D0%B5%D1%80%D0%B0%D0%B4%D0%B8%D0%B0%D0%BD" title="Стерадиан – 俄文" lang="ru" hreflang="ru" data-title="Стерадиан" data-language-autonym="Русский" data-language-local-name="俄文" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-scn mw-list-item"><a href="https://scn.wikipedia.org/wiki/Steradianti" title="Steradianti – 西西里文" lang="scn" hreflang="scn" data-title="Steradianti" data-language-autonym="Sicilianu" data-language-local-name="西西里文" class="interlanguage-link-target"><span>Sicilianu</span></a></li><li class="interlanguage-link interwiki-sh mw-list-item"><a href="https://sh.wikipedia.org/wiki/Steradijan" title="Steradijan – 塞爾維亞克羅埃西亞文" lang="sh" hreflang="sh" data-title="Steradijan" data-language-autonym="Srpskohrvatski / српскохрватски" data-language-local-name="塞爾維亞克羅埃西亞文" class="interlanguage-link-target"><span>Srpskohrvatski / српскохрватски</span></a></li><li class="interlanguage-link interwiki-si mw-list-item"><a href="https://si.wikipedia.org/wiki/%E0%B7%83%E0%B7%8A%E0%B6%A7%E0%B7%8A%E2%80%8D%E0%B6%BB%E0%B7%9A%E0%B6%A9%E0%B7%92%E0%B6%BA%E0%B6%B1%E0%B6%BA" title="ස්ට්‍රේඩියනය – 僧伽羅文" lang="si" hreflang="si" data-title="ස්ට්‍රේඩියනය" data-language-autonym="සිංහල" data-language-local-name="僧伽羅文" class="interlanguage-link-target"><span>සිංහල</span></a></li><li class="interlanguage-link interwiki-simple mw-list-item"><a href="https://simple.wikipedia.org/wiki/Steradian" title="Steradian – Simple English" lang="en-simple" hreflang="en-simple" data-title="Steradian" 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/Steradi%C3%A1n" title="Steradián – 斯洛伐克文" lang="sk" hreflang="sk" data-title="Steradián" data-language-autonym="Slovenčina" data-language-local-name="斯洛伐克文" 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/Steradian" title="Steradian – 斯洛維尼亞文" lang="sl" hreflang="sl" data-title="Steradian" data-language-autonym="Slovenščina" data-language-local-name="斯洛維尼亞文" 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/%D0%A1%D1%82%D0%B5%D1%80%D0%B0%D0%B4%D0%B8%D1%98%D0%B0%D0%BD" title="Стерадијан – 塞爾維亞文" lang="sr" hreflang="sr" data-title="Стерадијан" data-language-autonym="Српски / srpski" data-language-local-name="塞爾維亞文" 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/Steradian" title="Steradian – 瑞典文" lang="sv" hreflang="sv" data-title="Steradian" data-language-autonym="Svenska" data-language-local-name="瑞典文" 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%A4%E0%AE%BF%E0%AE%A3%E0%AF%8D%E0%AE%AE%E0%AE%B5%E0%AE%BE%E0%AE%B0%E0%AF%88%E0%AE%AF%E0%AE%A9%E0%AF%8D" title="திண்மவாரையன் – 坦米爾文" lang="ta" hreflang="ta" data-title="திண்மவாரையன்" data-language-autonym="தமிழ்" data-language-local-name="坦米爾文" 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%B8%AA%E0%B9%80%E0%B8%95%E0%B8%AD%E0%B9%80%E0%B8%A3%E0%B9%80%E0%B8%94%E0%B8%B5%E0%B8%A2%E0%B8%99" title="สเตอเรเดียน – 泰文" lang="th" hreflang="th" data-title="สเตอเรเดียน" data-language-autonym="ไทย" data-language-local-name="泰文" 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/Steradyan" title="Steradyan – 土耳其文" lang="tr" hreflang="tr" data-title="Steradyan" data-language-autonym="Türkçe" data-language-local-name="土耳其文" 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%A1%D1%82%D0%B5%D1%80%D0%B0%D0%B4%D1%96%D0%B0%D0%BD" title="Стерадіан – 烏克蘭文" lang="uk" hreflang="uk" data-title="Стерадіан" data-language-autonym="Українська" data-language-local-name="烏克蘭文" 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%B3%D9%B9%D8%B1%DB%8C%DA%88%DB%8C%D9%86" title="سٹریڈین – 烏都文" lang="ur" hreflang="ur" data-title="سٹریڈین" data-language-autonym="اردو" data-language-local-name="烏都文" 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/Steradian" title="Steradian – 烏茲別克文" lang="uz" hreflang="uz" data-title="Steradian" data-language-autonym="Oʻzbekcha / ўзбекча" data-language-local-name="烏茲別克文" 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/Steradian" title="Steradian – 越南文" lang="vi" hreflang="vi" data-title="Steradian" data-language-autonym="Tiếng Việt" data-language-local-name="越南文" 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/%E7%90%83%E9%9D%A2%E5%BA%A6" title="球面度 – 吳語" lang="wuu" hreflang="wuu" data-title="球面度" data-language-autonym="吴语" data-language-local-name="吳語" 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/%E7%90%83%E9%9D%A2%E5%BA%A6" title="球面度 – 中文" lang="zh" hreflang="zh" data-title="球面度" data-language-autonym="中文" data-language-local-name="中文" class="interlanguage-link-target"><span>中文</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/Q177612#sitelinks-wikipedia" title="改跨語言拎" class="wbc-editpage">改拎</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="空間名"> <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 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class="vector-menu-content-list"> <li class="wb-otherproject-link wb-otherproject-commons mw-list-item"><a href="https://commons.wikimedia.org/wiki/Category:Steradian" hreflang="en"><span>維基同享</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/Q177612" title="連到接住資料儲存庫嘅項目[g]" accesskey="g"><span>維基數據項</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="頁面工具"> <div id="vector-page-tools-pinned-container" class="vector-pinned-container"> </div> </nav> <nav class="vector-appearance-landmark" aria-label="閱讀設定"> <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">閱讀設定</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-appearance.pin">移去側欄</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-appearance.unpin">收埋</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">出自維基百科，自由嘅百科全書</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="yue" dir="ltr"><figure class="mw-halign-right" typeof="mw:File/Thumb"><a href="/wiki/File:Steradian.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/9/98/Steradian.svg/150px-Steradian.svg.png" decoding="async" width="150" height="150" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/9/98/Steradian.svg/225px-Steradian.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/9/98/Steradian.svg/300px-Steradian.svg.png 2x" data-file-width="433" data-file-height="433" /></a><figcaption>1球面度</figcaption></figure> <p><b>球面度</b>（<b>steradian</b>，符號：<b>sr</b>）係<a href="/wiki/%E5%9C%8B%E9%9A%9B%E5%96%AE%E4%BD%8D%E5%88%B6" title="國際單位制">國際單位制</a>嘅<a href="/w/index.php?title=%E7%AB%8B%E9%AB%94%E8%A7%92&action=edit&redlink=1" class="new" title="立體角 (無呢版)">立體角</a>單位。<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>用嚟表達喺三維空間嘅角所生成嘅二維（平面）空間。英文名源自希臘文<i>stereos</i>（立體）同拉丁文<i>radius</i>（光線），亦有一說係源自<i>radian</i>（弧度）。 </p><p>球面度同<a href="/wiki/%E5%BC%A7%E5%BA%A6" title="弧度">弧度</a>一樣係冇維度（dimensionless）嘅，因為佢代表球面面積同半徑長度平方嘅比。 </p><p>喺個半徑為 <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle r}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>r</mi> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle r}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/0d1ecb613aa2984f0576f70f86650b7c2a132538" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:1.049ex; height:1.676ex;" alt="{\displaystyle r}"></span>嘅球體裏面，如果以球心為頂點嘅立體角所對應嘅球面表面積係 <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle r^{2}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <msup> <mi>r</mi> <mrow class="MJX-TeXAtom-ORD"> <mn>2</mn> </mrow> </msup> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle r^{2}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/a363a15442d031416d1eb62254a9c726e3f6c66c" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:2.103ex; height:2.676ex;" alt="{\displaystyle r^{2}}"></span>，咁隻立體角就係 1 球面度。球體表面積係 <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle 4\pi r^{2}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mn>4</mn> <mi>π</mi> <msup> <mi>r</mi> <mrow class="MJX-TeXAtom-ORD"> <mn>2</mn> </mrow> </msup> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle 4\pi r^{2}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/b81fcce302776a01dc66fc186a1ce0a616b4d772" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:4.597ex; height:2.676ex;" alt="{\displaystyle 4\pi r^{2}}"></span>，因此整個球體係<span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle 4\pi }"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mn>4</mn> <mi>π</mi> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle 4\pi }</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/057444bf35a0c22b19bcae1ef06e06ecdf8abe56" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:2.494ex; height:2.176ex;" alt="{\displaystyle 4\pi }"></span>球面度。 </p> <div class="mw-heading mw-heading2"><h2 id="參考"><span id=".E5.8F.83.E8.80.83"></span>參考</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=%E7%90%83%E9%9D%A2%E5%BA%A6&action=edit&section=1" title="編輯小節: 參考"><span>編輯</span></a><span class="mw-editsection-bracket">]</span></span></div> <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:r2190673">.mw-parser-output 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font-weight:bold;"> ·</span> <a href="/wiki/%E5%BA%AB%E5%80%AB" title="庫倫">庫倫</a> <span style="white-space:nowrap; font-weight:bold;"> ·</span> <a href="/wiki/%E5%8B%92%E5%85%8B%E6%96%AF" title="勒克斯">勒克斯</a> <span style="white-space:nowrap; font-weight:bold;"> ·</span> <a href="/wiki/%E6%B5%81%E6%98%8E" title="流明">流明</a> <span style="white-space:nowrap; font-weight:bold;"> ·</span> <a href="/wiki/%E7%89%9B%E9%A0%93_(%E5%96%AE%E4%BD%8D)" title="牛頓 (單位)">牛頓</a> <span style="white-space:nowrap; font-weight:bold;"> ·</span> <a href="/wiki/%E9%96%8B%E7%89%B9" title="開特">開特</a> <span style="white-space:nowrap; font-weight:bold;"> ·</span> <a href="/wiki/%E6%AD%90%E5%A7%86" title="歐姆">歐姆</a> <span style="white-space:nowrap; font-weight:bold;"> ·</span> <a class="mw-selflink selflink">球面度</a> <span style="white-space:nowrap; font-weight:bold;"> ·</span> <a href="/wiki/%E5%B8%95%E6%96%AF%E5%8D%A1" title="帕斯卡">帕斯卡</a> <span style="white-space:nowrap; font-weight:bold;"> ·</span> <a 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href="/wiki/2019%E5%B9%B4SI%E5%9F%BA%E7%A4%8E%E5%96%AE%E4%BD%8D%E9%87%8D%E6%96%B0%E5%AE%9A%E7%BE%A9" title="2019年SI基礎單位重新定義">2019年重新定義</a></div></td></tr></tbody></table></div> <table class="metadata plainlinks stub" style="background: transparent;" role="presentation"><tbody><tr class="noresize"> <td><span typeof="mw:File"><a href="/wiki/File:Nuvola_apps_kruler.svg" class="mw-file-description"><img alt="Stub icon" src="//upload.wikimedia.org/wikipedia/commons/thumb/a/a6/Nuvola_apps_kruler.svg/35px-Nuvola_apps_kruler.svg.png" decoding="async" width="35" height="35" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/a/a6/Nuvola_apps_kruler.svg/53px-Nuvola_apps_kruler.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/a/a6/Nuvola_apps_kruler.svg/70px-Nuvola_apps_kruler.svg.png 2x" data-file-width="128" data-file-height="128" /></a></span></td> <td><div class="notice metadata" id="stub" style="font-size: small;">呢篇標準或者測量文係<a 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