Question

Define white hole...​

Answer 1

Answer:

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. ... White holes appear in the theory of eternal black holes.

Answer 2

Reference Article: Facts about white holes. This visualization shows a jet blasting from a black hole near the speed of light. In theory, a white hole looks similar to a black hole, but instead of sucking matter in, a white hole pushes matter away.

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