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

Options

A. Black body will absorb more 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

D

Explanation

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 will remain same only when energy emitted is equal to energy absorbed.