In a closed universe, if you could send out a powerful enough light, it would eventually return from behind you.

Name: In a closed universe, if you could send out a powerful enough light, it would eventually return from behind you.
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Question

Quizplus · Accepted Answer

In a closed universe, which is finite and without boundaries, light can travel large distances and eventually return to its starting point, potentially from the opposite direction.

In a Closed Universe, If You Could Send Out a Powerful