Luminosity of 4 solar mass main sequence star? Luminosity of 8 solar mass main sequence star? Can we measure the luminosity of the 4 solar mass red giant star?

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Chapter 8, Problem 13P

To determine

Luminosity of 4 solar mass main sequence star?

Luminosity of 8 solar mass main sequence star?

Can we measure the luminosity of the 4 solar mass red giant star?

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