Question

Can anyone tell what is a white hole? Is it the exit of a black hole?​

Answer 1

A white hole according to some theories is the other end of the black hole if the blackhole itself being considered as an Einstein-rosen bridge which would open in an alternate maybe dimension where a black hole instead of feeding on objects throws objects out and such a body will be called a white hole and it will exist in some alternate universe where physics is exactly reversed from how it is right now in ours

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