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Coefficient of emission or emissivity (e...

Coefficient of emission or emissivity (e) is defined as

A

ratio of emissive power of a body to that of a emissive power of perfectly black body at the same temperature.

B

product of the emissive powers of the body and perfectly black body at the same temperature.

C

ratio of emissive power of the body to that of perfectly black body

D

product of emissive powers of the body and perfectly back body

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The correct Answer is:
A
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