Question

what is a black hole and a white hole ?

Answer 1

Explanation:

In general relativity, a white hole is a hypothetical region of spacetime which cannot be entered from the outside, although matter and light can escape from it. In this sense, it is the reverse of a black hole, which can only be entered from the outside and from which matter and light cannot escape.

Answer 2

Answer:

Hopefully it will help you and sorry if it is wrong.