Kirchhoff's law states that

Question

Options:

A . The total radiation from a black body per second per unit area is directly proportional to the fourth power of the absolute temperature

B . The wave length corresponding to the maximum energy is proportional to the absolute temperature

C . None of these

D . The ratio of the emissive power and absorptive power of all bodies is the same and is equal to the emissive power of a perfectly black body

Answer: Option D

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