The flatness problem arises because only a universe with __________ can have that value forever. A)Ω_mass +Ω_Λ= 0 B)Ω_mass +Ω_Λ =1 C)Ω_mass +Ω_luminous =1 D)Ω_luminous +Ω_Λ =1 E)Ω_luminous+ Ω_Λ =0

Question

Quizplus · Accepted Answer

The flatness problem is concerned with the value of Ω (omega), the density parameter. The question is why is Ω so close to 1 today and what was its value in the past? The answer is that only a universe with Ω = 1 can have that value forever, meaning that the universe will neither expand nor contract but will maintain its current size. Therefore, the correct choice is B, Ωmass + ΩΛ = 1, which implies a flat universe.

The Flatness Problem Arises Because Only a Universe with __________