Suppose a star has a luminosity of 2.0×10^29 watts and an apparent brightness of 3.0×10^−15 watt/m^2. How far away is it? Give your answer in both kilometers and light-years.
Added by Joshua S.
Step 1
We know the luminosity (L) of the star is 2.0×10^29 watts and the apparent brightness (B) is 3.0×10^(-15) watt/m^2. Show more…
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