Two Stars Are Found to Have the Same Luminosity

Two stars are found to have the same luminosity. However, one star has twice the surface temperature of the other. From this information, what can one determine about their radii?

A) The hotter star has half the radius of the cooler star.
B) The cooler star has half the radius of the hotter star.
C) The hotter star has a quarter the radius of the cooler star.
D) Nothing can be determined about the radii from this information.

Correct Answer:

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