White hole

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. 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 known physical processes through which a white hole could be formed. No white hole has ever been observed. Also, the laws of thermodynamics say that the net entropy in the universe can either increase or remain constant. This rule is violated by white holes, as they tend to decrease entropy.

Like black holes, white holes have properties like mass, charge, and angular momentum. They attract matter like any other mass, but objects falling towards a white hole would never actually reach the white hole's event horizon (though in the case of the maximally extended Schwarzschild solution, discussed below, the white hole event horizon in the past becomes a black hole event horizon in the future, so any object falling towards it will eventually reach the black hole horizon). Imagine a gravitational field, without a surface. Acceleration due to gravity is the greatest on the surface of any body. But since black holes lack a surface, acceleration due to gravity increases exponentially, but never reaches a final value as there is no considered surface in a singularity.

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Latest News for: white hole

GOLF: Ridgeland Boys, Heritage Girls Earn Wins

On the hoof: readers’ favourite horse riding breaks in Europe

'That's crazy': Rare right whale sighting in Gulf off Fort Myers, Florida caught on video

How to make perfect hard-boiled eggs for Easter

Blockbuster boosts sales of lotus root

John Rawls and the Trumpocene: A Eulogy for Justice

Black holes: Endings or beginnings? New white hole theory challenges physics

Get a TaylorMade Spider putter like Players Champ Rory McIlroy

Black Holes Could Be Tunnels to White Holes, New Theory Suggests

Rory McIlroy’s clubs: Inside his Players Championship-winning setup

Trump's cryptic golf comment startles MAGA world | Daily Mail Online

The top 11 fast food chains of all time, ranked

Trump twists the knife after 'monsters' deported from the US arrive at notorious El Salvador ...

Trump has fired scientists who monitor the ocean. It comes at the worst possible time

From the archives: Building reviews the Channel tunnel terminals

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