What kind of curvature (geometry of space)does the universe have if the universe is just bounded (density = critical density)?
A) Flat
B) Closed
C) Open
D) Curvature does not depend on density.

Question

Quizplus · Accepted Answer

If the universe is just bounded with a density equal to the critical density, it means that the curvature of space is flat. This is because the critical density is the amount of matter and energy needed for the universe to be exactly flat. If the actual density is equal to the critical density, then the universe must be flat.

What Kind of Curvature (Geometry of Space)does the Universe Have