If all stars are considered to be perfect blackbodies, then which of these relationships should hold regarding the energy flux, or energy emitted per unit area, from stars?
A) All stars of the same mass emit the same energy flux.
B) All stars of the same temperature emit the same energy flux.
C) All stars of the same composition (made of exactly the same material) emit the same energy flux.
D) All stars of the same distance emit the same energy flux.

Question

Quizplus · Accepted Answer

The energy flux from a star, as described by the Stefan-Boltzmann law, is directly related to its temperature to the fourth power. Therefore, stars of the same temperature, assuming they are perfect blackbodies, will emit the same energy flux regardless of their mass, composition, or distance.

If All Stars Are Considered to Be Perfect Blackbodies, Then