Recent content by tortin

Hmm, so for Universe A (the critical one), we would have: (removing the constants 8piG/3) \Omega \propto \frac{\rho}{H(t)^{2}} However, H(t) = \frac{\dot{R}}R, so we can replace it such that: \dot{R}^{2}\Omega \propto \rho \rho \propto \Omega z^{2} (z being redshift) So for universe A...

Hi, I was looking through past exams for one of my courses, and I came across a question I wasn't quite sure how to do, so I was wondering if anyone could give some hints (or possibly the rationale for solution), thanks! Homework Statement Observers in three universes A, B, and C measure...