A critically bound universe is geometrically flat.

Question

Quizplus · Accepted Answer

A critically bound universe has just enough matter to eventually stop the expansion of the universe, but not enough to cause it to collapse back in on itself. In such a universe, the geometry is flat. A critically bound universe has just enough matter to eventually halt its expansion, but not enough to cause it to collapse on itself. This type of universe is also referred to as a flat universe, meaning its geometry is flat as opposed to curved. Therefore, a critically bound universe is geometrically flat.

A Critically Bound Universe Is Geometrically Flat