Question

if the absolute temperature of a perfect black body is doubled, then its rate of radiation increases by a factor of (A) 2 (B) 4 (C) 8 (D) 16

Answer 1

Dear Student,
According to Stefan's law, the rate of energy radiation emitted by a black body is directly proportional to T⁴ where T is the temperature of the black body. Thus, when temperature of a black body becomes twice, it rate of emission of radiation increases by 2⁴ times, i.e., 16 times.
Ans (D)

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