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________?

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Academy of PakistanTest & Learning

804Active Users

450Mechanical EngineeringMedium

A0.45

B0.40

C0.75

D0.60

E0.55

Correct answer

A. 0.45

Explanation

The correct answer is 0.45.

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________? - Answer and Explanation | Academy of Pakistan