If you compare two stars,
A)the one with the larger radius will always have the greater luminosity.
B)the one with the higher surface temperature will always have the greater luminosity.
C)the one with the smaller absolute magnitude will always have the greater luminosity.
D)the one with the larger surface area has the greater energy flux from its surface.

Question

Quizplus · Accepted Answer

The absolute magnitude of a star measures its luminosity from a standard distance. A smaller (or more negative) absolute magnitude indicates a brighter star, thus a greater luminosity. Options A, B, and D are not always true because luminosity depends on both the star's radius (or surface area) and its surface temperature, not on either factor alone.

If You Compare Two Stars