In a closed universe a beam of light will:
A)come back to where it originated.
B)continue on forever.
C)move on a circular path around its origin.
D)reflect off the edge of the universe and come back.
E)go on some strange path, never to return.

Question

Quizplus · Accepted Answer

In a closed universe, light travels along geodesics that form closed curves. Therefore, a beam of light will eventually return to its origin. In a closed universe, space is curved in such a way that all paths eventually lead back to their starting point. This means that a beam of light would also follow this curvature and return to its origin.

In a Closed Universe a Beam of Light Will