what is black body radiation
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An object that absorbs all radiation falling on it, at all wavelengths, is called a black body. When a black body is at a uniform temperature, its emission has a characteristic frequency distribution that depends on the temperature. Its emission is called black-body radiation.
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A black body is a metal sphere coated with platinum - black and a hole on its surface.
A perfect black - body emits and absorbs all radiations .
However a perfect black - body does not exist .
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