Question

Two identical objects $A$ and $B$ are at temperatures $T_{A}$ and $T_{B}$ respectively. Both objects are placed in a room with perfectly absorbing walls maintained at a temperature $T\left(\right.T_{A}>T>T_{B}\left.\right)$ . The objects $A$ and $B$ attain the temperature $T$ eventually. Select the correct statements from the following

• A. $A$ only emits radiations, while $B$ only absorbs it until both attain the temperature $T$
• B. $A$ loses more heat by radiation than it absorbs, while $B$ absorbs more radiation than it emits until they attain the temperature $T$
• C. Both $A \, $ and $B$ only absorb radiation but do not emit it, until they attain the temperature $T$ .
• D. $B$ only emits radiations, while $A$ only absorbs it until both attain the temperature $T$

Answer 1

Answer: (B)

Every object emits and absorbs the radiations simultaneously. If the energy emitted is more than the energy absorbed temperature falls and vice versa.