Assertion :The energy radiated per unit volume, i.e., energy density in black body radiation depends upon the temperature. Reason: Green light is never emitted in black body radiations.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.

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Assertion is correct but Reason is incorrect.

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Both Assertion and Reason are incorrect.

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Solution

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.
Energy radiated per unit volume, i.e., the energy density in black body radiation depends on temperature according to,

$P = e σ A T^{4}$
where $σ$ is Stefan constant.

Greenlight is never emitted in black body radiations because most of the light it radiates is infrared which is not perceived by the human eye.

Thus, Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.

Hence, the correct option is $B$

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(c) Assertion is correct, but reason is incorrect
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