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Mathematics 12 Online
OpenStudy (anonymous):

The brightness of stars can be expressed through the logarithmic equation m = 6 - 2.5 log(L/l0) L0 ), where m is the magnitude of brightness, L is the light flux of the star and L0 is the light flux of the dimmest stars visible to the naked eye. If the light flux of the dimmest stars is 10-6, what is the magnitude of a star with a light flux of 7.5 × 10-2?

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