If the absolute temperature of an object is tripled,the thermal power radiated by this object (assuming that its emissivity and size are not affected by the temperature change)will
A)increase by a factor of 3.
B)increase by a factor of 9.
C)increase by a factor of 18.
D)increase by a factor of 27.
E)increase by a factor of 81.

Question

Quizplus · Accepted Answer

The thermal power radiated by an object is proportional to the fourth power of its absolute temperature (Stefan-Boltzmann Law). If the temperature is tripled, the power increases by 3^4 = 81 times.

If the Absolute Temperature of an Object Is Tripled,the Thermal