Stars of similar temperatures but different sizes
A) will have similar luminosities but different masses.
B) will have similar masses but different distances.
C) will have different spectral types but similar luminosities.
D) will have similar spectral types but different luminosities.

Question

Quizplus · Accepted Answer

The spectral type of a star is determined by its temperature, so stars of similar temperature will have similar spectral types. However, their different sizes will result in different luminosities, as larger stars have more surface area to radiate energy from than smaller stars. Therefore, stars of similar temperatures but different sizes will have similar spectral types but different luminosities.

Stars of Similar Temperatures but Different Sizes