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

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