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physicsnoob12
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what is a white hole and how does it differ from a black hole?
A white hole is a hypothetical object in space that is the opposite of a black hole. While a black hole sucks in matter and light, a white hole is thought to expel matter and light.
A white hole differs from a black hole in several ways. Firstly, a black hole has an event horizon, a boundary beyond which nothing, including light, can escape. A white hole, on the other hand, is theorized to have an event horizon in which nothing can enter. Additionally, while a black hole is thought to have a singularity at its center, a white hole is thought to have a "white point" or a point of origin for the matter and energy it expels.
No, there are currently no observed white holes in the universe. While there are several candidate objects that have been proposed as potential white holes, such as the white hole at the center of the Big Bang, there is no definitive evidence to support their existence.
It is currently unknown what would happen if a black hole and a white hole collided. Some theories suggest that they may cancel each other out or create a wormhole, while others propose that they would simply pass through each other without any interaction. This is an area of ongoing research and debate among scientists.
There is currently no scientific evidence to suggest that white holes could be used for time travel. While some theories propose that white holes may be connected to black holes through a wormhole, the concept of using wormholes for time travel is still purely speculative. Additionally, the extreme physical conditions near white holes would make it difficult for any form of matter or information to survive, further complicating the possibility of using them for time travel.