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Black-body radiation is the thermal electromagnetic radiation within or surrounding a body in thermodynamic equilibrium with its environment, emitted by a black body (an idealized opaque, non-reflective body). It has a specific spectrum of wavelengths, inversely related to intensity that depend only on the body's temperature, which is assumed for the sake of calculations and theory to be uniform and constant. The term black body was introduced by Gustav Kirchhoff in 1860. Black-body radiation is also called thermal radiation, cavity radiation, complete radiation or temperature radiation.

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rdfs:label
  • Hohlraumstrahlung
  • Black-body radiation
  • Radiación de cuerpo negro
  • Rayonnement du corps noir
  • Radaíocht dúchoirp
  • Radiasi benda-hitam
  • 黒体放射
  • Radiação de corpo negro
  • 黑体辐射
rdfs:comment
  • 黒体放射(こくたいほうしゃ、英: black body radiation)とは、黒体が放出する熱放射である。熱した物質や恒星の発する光が、比較的温度が低いときは赤っぽく、温度が高いほど青白くなる理由は、黒体放射の温度特性によるものである。
  • A radiação do corpo negro é a radiação eletromagnética térmica dentro ou ao redor de um corpo em equilíbrio termodinâmico com seu ambiente, ou emitida por um corpo negro (um corpo opaco e não reflexivo). Ela tem um espectro específico e intensidade que depende apenas da temperatura do corpo, o que é assumido por uma questão de cálculos e teoria para ser uniforme e constante.
  • 黑体辐射指处于热力学平衡态的黑体发出的电磁辐射。黑体辐射的电磁波谱只取决于黑体的温度。 另一方面,所謂黑體輻射其實就是光和物質達到平衡所表現出的現象。物質達到平衡,所以可以用一個溫度來描述物質的狀態,而光和物質的交互作用很強,如此光和光之間也可以用一個溫度來描述(光和光之間本身不會有交互作用,但光和物質的交互作用很強)。而描述這關係的便是普朗克分佈(Planck distribution)。黑体辐射能量按波长的分布仅与温度有关。 黑体不仅仅能全部吸收外来的电磁辐射,且散射电磁辐射的能力比同温度下的任何其它物体强。 对于黑体的研究,使自然现象中的量子效应被發现。黑体作为一个理想化的物体,在现实中是不存在的,因此现实中物体的辐射也与理论上的黑体辐射有所出入。但是,可以观察一些非常类似黑体的物质发出的辐射,例如一顆恆星或一個只有單一開口的空腔所发出的辐射。舉個例來說,人們觀測到宇宙背景輻射,對應到一個約3K的黑體輻射,這暗示宇宙早期光是和物質達到平衡的。而隨著時間演化,溫度慢慢降了下來,但方程式依然存在。(頻率和溫度的效應抵銷)
  • Black-body radiation is the thermal electromagnetic radiation within or surrounding a body in thermodynamic equilibrium with its environment, emitted by a black body (an idealized opaque, non-reflective body). It has a specific spectrum of wavelengths, inversely related to intensity that depend only on the body's temperature, which is assumed for the sake of calculations and theory to be uniform and constant. The term black body was introduced by Gustav Kirchhoff in 1860. Black-body radiation is also called thermal radiation, cavity radiation, complete radiation or temperature radiation.
  • La radiación del cuerpo negro es la radiación electromagnética térmica dentro o alrededor de un cuerpo en equilibrio termodinámico con su entorno, o emitida por un cuerpo negro (un cuerpo opaco y no reflectante). Tiene un espectro y una intensidad específicos que dependen solo de la temperatura del cuerpo, que se asumen para simplificar los cálculos y la teoría como uniformes y constantes.​​​​
  • An radaíocht leictreamaighnéadach a astaíonn dúchorp, bíonn dáileadh minicíochta (is tonnfhad) inti a bhraitheann ar theocht an dúchoirp amháin. Más é 500 K teocht an dromchla, níl ach radaíocht infridhearg idir na tonnfhaid 1,500 nm is 100,000 nm i gceist, agus í dofheicthe. Ag teocht 1,000 K, astaíonn dromchla an dúchoirp beagáinín dá radaíocht ag na tonnfhaid dhearga sa raon infheicthe, agus bíonn breo dearg ar an rud. Ag teocht níos airde fós, tarlaíonn radaíocht ar feadh an raoin infheicthe, agus deirtear go bhfuil an rud bánbhruithneach. Go bunúsach, éiríonn an astaíocht radaíochta seo ó ghluaiseachtaí na leictreon i ndromchla te. Nuair a théitear an t-ábhar ardaítear fuinneamh gach leictreoin go dtí leibhéal ceadaithe os cionn an bhunleibhéil. Nuair a chailleann leictreon an chéim i
  • Le rayonnement du corps noir, également appelé rayonnement complet ou rayonnement thermique, est le type de rayonnement électromagnétique à l'intérieur ou entourant un corps en équilibre thermodynamique avec son environnement, ou émis par un corps noir (un corps opaque et non réfléchissant) maintenu à une température constante et uniforme. Le rayonnement possède un spectre spécifique et une intensité qui dépend seulement de la température du corps. L'expression « corps noir » a été introduite par Gustav Kirchhoff en 1860.
  • Radiasi benda-hitam adalah salah satu jenis radiasi elektromagnetik termal yang terjadi di dalam atau di sekitar benda dalam keadaan kesetimbangan termodinamika dengan lingkungannya atau saat ada proses pelepasan dari benda hitam. Benda hitam merupakan benda yang buram dan tidak memantulkan cahaya. Diasumsikan demi perhitungan dan teori berada pada suhu konstan dan seragam. Radiasi ini memiliki spektrum dan intensitas spesifik yang bergantung hanya benda temperatur benda.
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