A black body also emits black-body radiation. The name "black body" is given because it absorbs all colors of light. Physical body that absorbs all incident electromagnetic radiation, regardless of frequency or angle of incidence. Shown for comparison is the classical Rayleigh–Jeans law and its ultraviolet catastrophe. ![]() As the temperature of a black body decreases, its intensity also decreases and its peak moves to longer wavelengths.
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