6. In the lectures, we derived the normalised version of the cosmological expansion equation: 2 (0) - H²(t) = H_ [12a-4(

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6 In The Lectures We Derived The Normalised Version Of The Cosmological Expansion Equation 2 0 H T H 12a 4 1 (176.56 KiB) Viewed 57 times

6. In the lectures, we derived the normalised version of the cosmological expansion equation: 2 (0) - H²(t) = H_ [12a-4(t) + Szma-ºt) + (1 – 127 – Sm – 12x)a-?(t) +121] All variables have their usual meaning. (a) Based on the above equation, show/explain why in a flat Universe at late times the Universe's expansion will be dominated by the cosmological constant, i.e., matter and radiation will be negligible. Interpreting the question and its terminology correctly: Arguing correctly: 1 mark 1 mark (b) Show that for a A-dominated universe the cosmic scale factor grows exponentially. Setting up what to do (finding the differential equation that 1 mark needs solving): Correct execution: 1 mark