A star with the same color as another but 100 times brighter must be ___________.
A) 100 times colder
B) 100 times closer
C) 100 times hotter
D) 100 times larger
E) none of the above

Question

Quizplus · Accepted Answer

The brightness of a star is related to both its size and temperature. If two stars have the same color, they have similar surface temperatures. Therefore, if one star is 100 times brighter but has the same surface temperature (color), it must be significantly larger, specifically, it would be 100 times larger to account for the increased brightness.

A Star with the Same Color as Another but 100