If the Sun's luminosity were twice its actual value, Earth's temperature would
A) more than double.
B) double.
C) increase, but be less than double.
D) not be different.
E) decrease a small amount.

Question

Quizplus · Accepted Answer

The temperature of Earth is related to the fourth root of the Sun's luminosity, so if the luminosity doubles, the temperature would increase, but not double.

If the Sun's Luminosity Were Twice Its Actual Value, Earth's