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Depending on the radiating properties, a body will be opaque when

A. P = 0, x = 0 and a = 1

B. P=1, x = 0 and a = 0

C. P = 0, x = 1 and a = 0

D. X = 0, a + p = 1 Where a = absorptivity, p = reflectivity, X = transmissivity.

Correct Answer :

D. X = 0, a + p = 1 Where a = absorptivity, p = reflectivity, X = transmissivity.


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