what is a white hole ?
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what is a white hole ?
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A white hole is a hypothetical region of spacetime and singularity which cannot be entered from the outside, although energy-matter, light and information can escape from it.♥️
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In general relativity, a white hole is a hypothetical region of spacetime and singularity which cannot be entered from the outside, although energy matter, light and information can escape from it. In this sense, it is the reverse of a black hole, which can be entered only from the outside and from which energy-matter, light and information cannot escape. White holes appear in the theory of eternal black holes. In addition to a black hole region in the future, such a solution of the Einstein field equations has a white hole region in its past. However, this region does not exist for black holes that have formed through gravitational collapse, nor are there any observed physical processes through which a white hole could be formed.