1.

Depending on the radiating properties, body will be transparent when(Where a = absorptivity, p = reflectivity, x = transmissivity)

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
Answer» D. X = 0, a + p = 1


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