Homework Help: Visual Luminosity and flux of sun.

1. Feb 8, 2010

~Sam~

1. The problem statement, all variables and given/known data

Some values for the Sun are, bolometric luminosity Lbol = 3.83 x 10^26 W, bolometric correction = –0.07, and radius = 6.96 x 105 km.

Calculate the visual luminosity, LV, of the Sun and the flux, FV, radiated into space by the solar surface.

2. Relevant equations

M1-M2=-2.5 log (F1/F2)

3. The attempt at a solution

I have thought of several ways to do this..first way is to use bolometric luminosity and radius to calculate bolometric magnitude using formula M=-2.5 log (F). Since I know bolometric correction, I can find Mv, and then use the same formula to find visual flux, which in turn, find visual luminosity. Or could I just do it with M1-M2=-2.5 log (Luminosity1/Luminosity2). Actually...wait...couldn't i just use BC= M1-M2=-2.5 log (F1/F2)..Find the flux (F1) and from there get my luminosity?

Last edited: Feb 8, 2010