## White Hole and Black Hole

This probably could never happen but hypathetically speaking what would happen if a White Hole Collided with a Black Hole?

Sincerely
Tim
 Recognitions: Science Advisor It is hard to say, particularly since the concept of white hole is very hypothetical. For ordinary stuff, black holes would simply swallow it.
 Its not likely to happen. A present a white hole is only hypothetical, but since a white hole is the exact opposite of a black hole, then if they collided it is likely they would nutralize each other. Kinda like when matter and anti-matter come togather.

## White Hole and Black Hole

can someone tell me what white hole is?
 Right now white holes are practically make believe so it can do whatever you want.
 i know~! When a white hole and a black hole collides it will form a grey hole! lolz just kidding.Black holes would be too vast for the white hole, in hypothesis, the white hole would be sucked up.
 Tom, in theory, a white hole is the exact opposite of a black hole. Therefore, whereas black holes 'suck things in', a white hole will 'spit things out' that had originally entered the black hole. However, white holes are almost definately hypothetical only. Kyle
 are you saying they are the place that the things crushed into a singulatiry would emit from... which would require wormhole or alt univerese?

 Quote by Tom McCurdy are you saying they are the place that the things crushed into a singulatiry would emit from... which would require wormhole or alt univerese?
yes... welcome to star trek...
 The hypothetical antithesis of a black hole, a white hole spews matter out. No antigravitational field has been discovered that actually produces this effect, however, so white holes remain purely speculative. One way wormholes could feasibly be generated is as a black hole that is attached to a white hole if they are found to exist. Some speculation exists that quasars are actually white holes instead of supermassive black holes, but this is not widely accepted within the astronomical community. Another strange solution is the "white hole," which in many respects is the mirror image of the black hole; rather than matter disappearing into the hole, matter appears at a white hole, and nothing can remain in the white hole. However, there is no evidence that white holes could form in the physical universe. Black holes are created when massive stars collapse, or perhaps by the collapse of extremely dense star clusters at the center of galaxies, but white holes would have to be placed ab initio into the universe. The Schwarzschild metric admits negative square root as well as positive square root solutions for the geometry. The complete Schwarzschild geometry consists of a black hole, a white hole, and two Universes connected at their horizons by a wormhole. White holes cannot exist, since they violate the second law of thermodynamics. what would happen if a White Hole Collided with a Black Hole? Given that their masses are equivalent $$dm_b = dm_w$$ and their Schwarzschild metrics and Schwarzschild geometries are mirror images, $$ds_b^2 = -ds_w^2$$, they would annihilate each other similarly to a matter-antimatter reaction. However, there would still be a remnant energy product, because energy is always conserved. Reference: http://www.astro.virginia.edu/~jh8h/.../chapter9.html http://casa.colorado.edu/~ajsh/schww.html http://www.wordiq.com/definition/White_hole
 Orion1, If nothing can remain inside a white hole, then it cannot have mass. I'd say that the white hole bounces of the black hole. They could never merge.
 hmm... matter and antimatter is being generated all the time in this universe... perhaps this originates from white holes, on the other end of black holes? ... it's worth considering anyway ... :D

 The hypothetical antithesis of a black hole, a white hole spews matter out. No antigravitational field has been discovered that actually produces this effect, however, so white holes remain purely speculative. One way wormholes could feasibly be generated is as a black hole that is attached to a white hole if they are found to exist.

Dose this mean that if they collided that perhaps the energy remmant would be a star.

 Quote by Mistic A present a white hole is only hypothetical, but since a white hole is the exact opposite of a black hole, then if they collided it is likely they would nutralize each other. Kinda like when matter and anti-matter come togather.
Where has it been said that matter and anti-matter neutralize each other? When matter and anti-matter collide they do not neutralize, rather they annhilate each other.

Yes, not only are white holes hypothetical, but black holes are hypothetical also. Even Einstein had disbelief in his mathematical equations proving a black hole much less a white hole.

 Yet Einstein himself vigorously denied their reality, believing, as did most of his contemporaries, that black holes were a mere mathematical curiosity.
Oh, is it even hypothesized that black holes and white holes are even in the same universe?
 Recognitions: Gold Member Science Advisor I will ponder the existence of 'white holes' right after the anti-graviton is detected.
 Aren't there some theories out there that say a white hole is simply a black hole? A white hole does everything exactly the opposite of a black hole. Therefore, a white hole would run backward in time. Now what is something that is constantly spitting out matter in reverse time? A black hole in forward time. Kinda like how an anti-photon is a photon.
 Maybe the big-bang is a white hole.