What kind of curvature (geometry of space)does the universe have if the universe is unbounded (density

Question

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

Quizplus · Accepted Answer

If the universe is unbounded (density < critical density), it means that the universe will continue to expand forever. In this scenario, the geometry of the universe is open, meaning it has negative curvature. This is because the gravitational pull of matter in the universe is not strong enough to cause the universe to collapse in on itself.

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