Q448
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
AnswerC.
0.55
D.
0.85
Answer: Option B
Solution
Answer: Option B
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