40% of incident radiant energy on the surface of a thermally transpare – McqOptions

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1.	40% of incident radiant energy on the surface of a thermally transparent body is reflected back. If the transmissivity ofthe body be 0.15, then the absorptivity of surface is
A.	0.45
B.	0.55
C.	0.40
D.	0.75
Answer» B. 0.55

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