Greetings everyone ,(adsbygoogle = window.adsbygoogle || []).push({});

Can anyone point me into the right direction on how to come out with a value/ expression for the density parameter of aradiation dominateduniverse.

Things that I know of/ can recall are:

Friedmann equation :

[tex] 8/3 \pi G ρ R^2 -kc^2 [/tex]

Also when radiation dominates matter then we get ρ = 1/R^4 ( I think)

Density parameter :

So what am I missing to give me the density parameter ? [itex]\Omega_{m}[/itex] = [itex]\rho / \rho_{critical}[/itex]

where

[itex]\rho_{critical}= (3H^2 q / 4Pi G) [/itex]

Any sort of help is appreciated.

-ibysaiyan

**Physics Forums - The Fusion of Science and Community**

# Density Parameter for radiation dominated universe

Know someone interested in this topic? Share a link to this question via email,
Google+,
Twitter, or
Facebook

Have something to add?

- Similar discussions for: Density Parameter for radiation dominated universe

Loading...

**Physics Forums - The Fusion of Science and Community**