noun, plural black·bod·ies. Physics.
a hypothetical body that absorbs without reflection all of the electromagnetic radiation incident on its surface.
Origin of blackbody
First recorded in 1700–10
Also called perfect radiator.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
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.
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