The light from a star a distance of m away is received on earth with an apparent…

PHYSICS · Subjective · A Level · Physics · Astrophysics · Astrophysics

Problem

The light from a star a distance of

6.6 \times 10^{17}

m away is received on earth with an apparent brightness of

3.0 \times 10^{-8}

W m

^{-2}

. Calculate the luminosity of the star.