The luminosity of a white dwarf is smaller than that of the Sun.
What is a white dwarf?
A white dwarf is a stellar core remnant composed mostly of electron-degenerate matter.
A white dwarf is very dense: its mass is comparable to the Sun's, while its volume comparable to the Earth's.
What is the luminosity of a white dwarf as compared to sun?
A white dwarf's faint luminosity comes from the emission of residual thermal energy; no fusion takes place in a white dwarf.
After a billion years the typical white dwarf is down to 0.001 the luminosity of the Sun.
Thus, the luminosity of a white dwarf is smaller than that of the Sun.
Learn more about luminosity here: https://brainly.com/question/6933301
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