Question

tell me about black hole
and also white whole
explain me​

Answer 1

White holes were long thought to be a figment of general relativity born from the same equations as their collapsed star brethren, black holes. ... While a black hole's event horizon is a sphere of no return, a white hole's event horizon is a boundary of no admission — space-time's most exclusive club.

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Answer 2

White Holes- In general relativity, a white hole is a hypothetical region of spacetime and singularity that cannot be entered from the outside, although energy-matter, light and information can escape from it.

Black Holes- A black hole is a region of spacetime where gravity is so strong that nothing—no particles or even electromagnetic radiation such as light—can escape from it. The theory of general relativity predicts that a sufficiently compact mass can deform spacetime to form a black hole.