# Cosmology: luminosity and magnitude

Jozefina Gramatikova

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## The Attempt at a Solution

(a)

(b)

Could you tell me if what I am doing is correct? In part (b) they want M as a function of L so I assumed we have to get rid of the l. Do I have to use l(m=0) = 1.52 x 10 ^(-8) ?[/B]