According of Kirchhoff's law

According of Kirchhoff's law Correct Answer Ratio of emissive power to absorptive power for all bodies is same and is equal to the emissive power of a perfectly black body

Kirchhoff's law states that the emissivity and the absorptivity of a surface at a given temperature and wavelength are equal.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. This statement is known as Kirchhoff's law
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