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A black body initially at absolute tempe...

A black body initially at absolute temperature `T_1` is kept inside a closed box at absolute temperature `T_2` . The chamber is now slightly opened so that it allows sunrays to enter. If `T_1` and `T_2` remain constant, then

A

rate of energy emitted from the black body increases.

B

rate of energy emitted from the black body remains same.

C

energy radiated by black body remains equal to the energy absorbed by it.

D

rate of energy absorption by the black body decreases.

Text Solution

Verified by Experts

The correct Answer is:
B, C
From Stefan.s law, Rate of energy emitted `prop (T_1-T_2)^4`
`T_1` and `T_2` remain constant.
So, rate of energy emitted = constant
Since `T_1` remains constant, then it implies that energy radiated by it equals the energy absorbed by it.
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