Star E is the same temperature as star F, but star E is four times as luminous as star F.How do the radii of the stars compare?
A) The radius of star E is twice that of star F.
B) The radius of star E is four times that of star F.
C) The radius of star F is twice that of star E.
D) The radius of star F is four times that of star E.
E) The radii are the same length.

Question

Quizplus · Accepted Answer

The luminosity of a star is proportional to the square of its radius when the temperature is constant. Since star E is four times as luminous as star F, the radius of star E must be twice that of star F.

Star E Is the Same Temperature as Star F, but Star