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 27.
B) increase by a factor of 3.
C) increase by a factor of 18.
D) increase by a factor of 9.
E) increase by a factor of 81.

Question

Quizplus · Accepted Answer

According to the Stefan-Boltzmann law, the thermal power radiated by an object is proportional to the fourth power of its absolute temperature (P ∝ T^4). If the temperature is tripled, the power increases by a factor of 3^4 = 81.

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