black body

black body
a hypothetical object capable of absorbing all the electromagnetic radiation falling on it (Freq. 9)

a black body maintained at a constant temperature is a full radiator at that temperature because the radiation reaching and leaving it must be in equilibrium

Syn: ↑blackbody, ↑full radiator
Hypernyms: ↑natural object

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black body noun
A body or surface that absorbs all incident radiation, reflecting none
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Main Entry:black

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black body, or black|bod|y «BLAK BOD ee», noun.
a theoretical surface or body capable of completely absorbing all the radiation falling on it. The energy radiated per second by each unit area of a perfect black body is proportional solely to the fourth power of its absolute temperature.

Useful english dictionary. 2012.

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