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Depending on the Radiating Properties, a Body Will Be Opaque

Question 16

Multiple Choice

Depending on the radiating properties, a body will be opaque when (where a = absorptivity, p = reflectivity, X = transmissivity.)

A) p = 0, x = 0 and a = 1
B) p=l,x = 0anda = 0
C) p = 0, x = 1 and a = 0
D) x - 0, a + p = 1
E) a=0,x + p= 1.

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