A main sequence star gradually expands into a red giant, increasing its radius by a factor of 100, while its surface temperature decreases slightly. Based on the Stefan-Boltzmann Law, what happens to its luminosity?

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The luminosity increases dramatically.

The H-R Diagram - Quiz Quiz

A main sequence star gradually expands into a red giant, increasing its radius by a factor of 100, while its surface temperature decreases slightly. Based on the Stefan-Boltzmann Law, what happens to its luminosity?

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