If the absolute temperature of the filament of a lamp were doubled,the energy radiated per second by the filament would
A)remain the same.
B)increase by a factor of 2.
C)increase by a factor of 4.
D)increase by a factor of 8.
E)increase by a factor of 16.

Question

Quizplus · Accepted Answer

The energy radiated per second by a filament is proportional to the fourth power of its absolute temperature according to the Stefan-Boltzmann law. Hence, if the absolute temperature is doubled, the energy radiated per second will increase by a factor of 2^4 = 16. Therefore, the correct answer is (E) increase by a factor of 16.

If the Absolute Temperature of the Filament of a Lamp