The luminosity of light emerging from the star's gaseous surface is equal to the . . .
A) star's lifetime.
B) mass of the star.
C) rate of energy generated from nuclear reactions in the star's core.
D) temperature of the star's core.
E) star's apparent brightness.

Question

Quizplus · Accepted Answer

The rate of energy generated from nuclear reactions in the star's core determines the luminosity of the star's gaseous surface. This energy is radiated outwards, providing the light and other forms of electromagnetic radiation that we observe from the star.

The Luminosity of Light Emerging from the Star's Gaseous Surface