NEET Physics Question - Thermal Physics - Heat Transfer

Assertion (A): The amount of radiation from sun's surface varies as the fourth power of its absolute temperature.

Reason (R): The sun is a black body.

Both (A) & (R) are true and the (R) is the correct explanation of the (A)

Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(A) is true but (R) is false

Both (A) and (R) are false

Solution:

Assertion (A) is a statement of the Stefan-Boltzmann law `\(E \propto T^4\)`. This law applies to black bodies. The Sun is an excellent approximation of a black body.

Therefore, both (A) and (R) are true, and (R) provides the correct explanation for why the Sun's radiation follows the fourth power of its absolute temperature.

Rankers Physics

Radiation from Sun

Solution:

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