Heat Transfer - Radiation: Practice Problem & Solution

Short Solution (Best for NEET):

To solve this problem, we apply the core principles of Heat Transfer - Radiation. Understanding the underlying formula is key to arriving at the correct answer below:

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.