Alpha Centauri A

PHYSICS · Numerical · A Level · Physics · Astrophysics · Astrophysics

Problem

Alpha Centauri A, a star in the constellation Centaurus, has a luminosity

1.52

times that of the Sun and is

4.3

light-years from Earth. The Sun is

8.33

light-minutes from Earth. Calculate the ratio of their apparent brightnesses,

\frac{b_{\alpha}}{b_{\odot}}