Question

When will be the radiation emitted by the body will be more as compared to the radiation it absorbs ?

• A. $\text{If the temperature of the body is more than its surrounding}$
• B. $\text{If the temperature of the surrounding is more than the temperature of the body}$
• C. $\text{Both (a) and (b) are correct}$
• D. $\text{None of the above}$

Answer 1

The correct option is A $\text{If the temperature of the body is more than its surrounding}$

We know that a body emits as well as absorbs radiation at any temperature above $0K$.
When the temperature of the body is more than the temperature of its surrounding the energy emitted by radiation is more than the energy gained by the body due to the absorbtion of the radiation from its surrounding.
Hence, $\left(a\right)$ is the correct answer.