STANDARD Physics Black Body Radiation MCQ Question
If the temperature of the Sun were to increase from T to 2T and its radius from R to 2R. The ratio of power, radiated by it would become
64 times
32 times
16 times
4 times
Correct Answer
Detailed Explanation
Power radiated is proportional to AσT⁴. If the radius doubles, the area becomes 4 times, and if the temperature doubles, T becomes 2T. Thus, power radiated becomes 4(2)⁴ times = 64 times.
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