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40 of incident radiant energy on the surface of a thermally...

This question belongs to Mechanical Engineering Heat And Mass Transfer
Heat and Mass Transfer
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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 & Solution
Correct Answer: Option A
a + p + T = 1
a + 0.40 + 0.15 = 1 (p = 0.40, T = 0.15)
a = 1 - 0.55
a = 0.45
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Abhishek Bhardwaj
Abhishek Bhardwaj 8 years ago
Solution pleased
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