Figure 1 -Figure 1 shows five graphs of the scale factor of the universe as a function of time. Which of these graphs would occur for a universe with $\Omega$ _mass $\gt$ 1 and $\Omega$ 1_$\wedge$ = 0? A) A B) B C) C D) D E) E

Question

Quizplus · Accepted Answer

According to the Friedmann equation, the scale factor of the universe is proportional to the square root of the energy density of the universe. In this case, the universe has critical density (F1F1F1S1F1F1F10_mass F1F1F1S1F1F1F10 1) and no cosmological constant (F1F1F1S1F1F1F10F1F1F1S1_F1F1F10 F1F1F1S1F1F1F10 0). Graph E shows a universe with critical density and no cosmological constant, which matches this description.

Figure 1 -Figure 1 Shows Five Graphs of the Scale Ω\OmegaΩ

Figure 1
-Figure 1 Shows Five Graphs of the Scale $\Omega$