Definition of blackbody

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DataRay Inc. - ISO 11146-Compliant Laser Beam Profilers

Photonics Dictionary

blackbody: An ideal body that completely absorbs all radiant energy striking it and, therefore, appears perfectly black at all wavelengths. The radiation emitted by such a body when heated is referred to as blackbody radiation. A perfect blackbody has an emissivity of unity.

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