- #1
HawkEye5220
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Homework Statement
For a κ=0 universe with no cosmological constant, show that H(z)=H0(1+z)3/2
Homework Equations
Friedmann equation: H2=[itex]\frac{8*\pi*g}{3c^2}[/itex]-[itex]\frac{κc^2}{r^2}[/itex]*[itex]\frac{1}{a(t)^2}[/itex]
The Attempt at a Solution
I know that R(z)=R0/(1+z) but I do not know where this comes from. Following this, I should be able to take a density ρ(z)=ρ(now)*(1+z)^3 and input it into the Friedman equation but I am not sure how to proceed