An ideal blackbody in physics and astronomy is an object that

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An ideal blackbody in physics and astronomy is an object that

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absorb and emit electromagnetic radiation at all wavelengths

Explanation:

A black person is believed to be a perfect absorber and radiation reflector. Blackbody, in physics, refers to a surface that absorbs all radiant energy that falls on it. It is thought that because incident visible light will be absorbed rather than reflected, the surface will appear black.