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>>/74548/ "A black body is an idealized physical object that absorbs all incident electromagnetic radiation, regardless of frequency or angle of incidence. In other words, it does not reflect or transmit any light, making it a perfect absorber. Because it absorbs all light, a black body appears completely black when it is at a temperature lower than its surroundings. However, a black body also radiates energy in the form of thermal radiation. This radiation is emitted purely based on the black body’s temperature, following a distribution of wavelengths known as black-body radiation."