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

Correct Answer: x = 0, a + p = 1

Opaque body are those body where the atoms are closely packed and the light cannot pass through. Whereas a light may or may not pass through a black body depending whether it is opaque or transparent.
Depending on the radiating properties, a body will be opaque when x = 0, a + p = 1.
Bissoy MCQ
#Mechanical Engineering #Heat And Mass Transfer

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