The flatness problem and the horizon problem can be explained by ____.
A) dark energy
B) the inflationary universe hypothesis
C) grand unified theories
D) the electroweak force
E) non-baryonic matter

Question

Quizplus · Accepted Answer

The inflationary universe hypothesis explains both the flatness problem and the horizon problem by proposing a period of extremely rapid expansion of the universe shortly after the Big Bang. This expansion would make the universe appear flat and homogeneous on large scales, addressing the issues raised by both problems.

The Flatness Problem and the Horizon Problem Can Be Explained