40% of incident radiant energy on the surface of a thermally transparent body is reflected back. If the transmissivity of the body be 0.15, then the emissivity of surface is____________________? | MCQ Hive

Mechanical Engineering Mcqs

Q 40% of incident radiant energy on the surface of a thermally transparent body is reflected back. If the transmissivity of the body be 0.15, then the emissivity of surface is____________________?

A A. 0.45
B B. 0.55
C C. 0.40
D D. 0.75

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