What is the difference between "luminosity" and "flux"?
A) Flux is determined by energy in the visible wavelengths only; luminosity is computed all across the spectrum.
B) Luminosity is the rate at which energy is emitted from an entire object; flux is luminosity per unit area.
C) Flux is the rate at which energy is emitted from an entire object; luminosity is flux per unit area.
D) They are the same thing.

Question

Quizplus · Accepted Answer

Luminosity refers to the total amount of energy emitted by an object (such as a star) per unit of time, across all wavelengths, not just visible light. It is a measure of the intrinsic brightness of the object. Flux, on the other hand, is a measure of how much of that energy passes through a given area (such as a square meter) in a given time, as observed from a specific distance. Therefore, flux depends on both the luminosity of the source and the distance from it, whereas luminosity is an inherent property of the object itself.

What Is the Difference Between "Luminosity" and "Flux