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blackbody

[blak-bod-ee]

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noun, plural black·bod·ies. Physics.

a hypothetical body that absorbs without reflection all of the electromagnetic radiation incident on its surface.

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Also called perfect radiator.

Origin:
1700–10

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Blackbody is always a great word to know.

So is base unit. Does it mean:

one of the units, as mass, length, time, or electric current, taken as a basis for a system of units in the sciences

radiation consisting of electromagnetic waves, including radio waves, infrared, visible light, ultraviolet, x-rays, and gamma rays

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American Heritage

Science Dictionary

blackbody

(blāk'bŏd'ē) Pronunciation Key
A theoretically perfect absorber and emitter of every frequency of electromagnetic radiation. The radiation emitted by a blackbody is a function only of its temperature.

American Heritage

Cultural Dictionary

blackbody definition

An object that can absorb and send off radiation with complete efficiency — that is, it reflects (see reflection) none of the radiation that falls on it. The higher the object's temperature, the higher the frequency of the radiation it gives off.

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Related Words

perfect radiator Planck's radiation law

Planck's radiation law

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blackbody

black·bod·y

blackbody definition