Two stars of the same spectral class must have the same
A)radius.
B)temperature.
C)mass.
D)distance.
E)all of the other choices.

Question

Quizplus · Accepted Answer

Two stars of the same spectral class must have the same temperature because spectral class is determined by temperature. Spectral class is a classification system based on the temperature and spectral lines of a star. Since the spectral class is determined by temperature, two stars of the same spectral class must have the same temperature. However, they can have different radii, masses, and distances from us. Therefore, option B is the correct answer.

Two Stars of the Same Spectral Class Must Have the Same