What physical concept distinguishes between 'flux' and 'luminosity' in stellar physics?

Answer

Flux is energy per unit area (dictated by surface temperature), while luminosity is the total energy output.

Flux describes the energy output over a specific area of the surface, which is highly dependent on surface temperature. Luminosity is the comprehensive measure of the total energy radiated by the entire object per unit time.

What physical concept distinguishes between 'flux' and 'luminosity' in stellar physics?
astronomystarsstellar evolutionred giantsLuminositymain sequence stars