Hi everyone. Loving the forum, don't know how I haven't stmble upon it already.(adsbygoogle = window.adsbygoogle || []).push({});

I'm studying Astronomy at the OU and finding a lot of the maths tough. Especially finding the chapters on Cosmology very difficult.

I've seen another post regarding Scale Factor, so hope it's ok posting this too.

There's a question in the text book, asking to determine the scale factor at the time when energy density for matter and radiation was the same using Rt / Rt(0)

So Rt(0) is now, which is just 1. And I believe Rt is stated as being 10^{-4}.

So 10^{-4}/ 1 is just going to be 10^{-4}. This seems odd. Am I missing something?

Thanks :-)

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# Scale factor

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