Question

A black body of temperature T is inside chamber of `T_0` temperature initially. Sun rays are allowed to fall from a hole in the top of chamber. If the temperature of black body (T) and chamber `(T_0)` remains constant, then

A. Black body will absorb radiation.
B. Black body will absorb less radiation.
C. Black body will emit more energy.
D. Black body will emit energy equal to energy absorbed by it.

Answer 1

Correct Answer - A::D
Since the sun rays fall on the black body, it will absorb radiations and since its temperature is constant, it will emit radiations. The temperature is will remain same only when energy emitted is equal to energy absorbed.