If a sunspot has a temperature of 4,500 K and the surrounding solar surface has a temperature of 5,800 K, how many times brighter is the surface compared to the sunspot
A)0.28
B)0.36
C)2.8
D)3.6
E)36

Question

Quizplus · Accepted Answer

The Stefan-Boltzmann law states that the power emitted by a blackbody is proportional to the fourth power of its temperature. Therefore, the ratio of the brightness of the solar surface to the brightness of the sunspot is:(5800 K / 4500 K)^4 = 2.8

If a Sunspot Has a Temperature of 4,500 K and the Surrounding