Physics, Astronomy & Cosmology / Re: How would it be if I stretched my arms out in a metre wide Universe ?« on: 02/08/2021 20:25:16 »
It depends on the nature of that universe. If it was a closed universe (like a hypersphere), your arms would stretch around it and you'd be able to shake your own hand. Since light would also loop around that universe, it would look as though you were surrounded by an uncountable number of copies of yourself. This was written about in Michio Kaku's book "Hyperspace".
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