Define coefficient of emission.
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Einstein coefficients are mathematical quantities which are a measure of the probability of absorption or emission of light by an atom or molecule.
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Answer:
emissive power of a body to emissive power of black body
Explanation:
The Coefficient of emission can be defined as the emissive power of anybody to emissive power of perfectly black body at the same temperature and wavelength. coefficient of emission is also called emissivity. For perfectly black body, emissivity or coefficient of emission is equal to 1. For body other than black body emissivity will not be one. For example, white body has emissivity equal to zero.
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