- #1
tomeatworld
- 51
- 0
Homework Statement
By comparing with the luminosity of the Sun, calculate the absolute magnitude of a 60W lightbulb. [THe absolute magnitude of the Sun is +4.75; you may ignore colour differences]
Homework Equations
m-M=5log(d/10pc)
[tex] f = \frac{L}{4\pi d^{2}}[/tex]
m1 - m2 = -2.5long(f1 / f2)
The Attempt at a Solution
I'm not really sure where to start. I know the luminsoty of the Sun to be 3.8x1026W but I'm not sure how it helps.