Out of 100 kcal/second of incident radiant energy on the surface of a – McqOptions

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1.	Out of 100 kcal/second of incident radiant energy on the surface of a thermally transparent body, 300 kcal/second is reflected back. If the transmissivity of the body is 0.25, the emissivity of the surface will be
A.	0.35
B.	0.45
C.	0.55
D.	0.85
Answer» C. 0.55

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