Figure 1 -Figure 1 shows five possible graphs of the scale factor of the universe as a function of time. Which of these graphs represent our universe where $\Omega$ _mass = 0.3 and $\Omega$ _$\wedge$ =0.7? A) A B) B C) C D) D E) E

Question

Quizplus · Accepted Answer

From the given information, we know that F1F1F1S1F1F1F10F1F1F1S1_F1F1F10 F1F1F1S1F1F1F10 0.7. This means that the universe is dominated by dark energy and has a flat geometry (since the density parameter for matter is 0.3, and the sum of all density parameters must be 1 for a flat universe). Option C shows a graph where the scale factor starts increasing rapidly at a certain point, which is consistent with the current understanding of the acceleration of the universe due to dark energy. The other graphs either do not show the right acceleration or do not have a flat geometry.

Figure 1 -Figure 1 Shows Five Possible Graphs of the Scale

Figure 1
-Figure 1 Shows Five Possible Graphs of the Scale