Why do scientists believe white holes are impossible?

[Ultrastar 1]

I think it's best to leave the decision of what does and does not belong here to the mods. After all, it's their job.

That may be so, but still super extreme black holes still have nothing to do with this subject. Unless anybody can prove to me that they do have something to do with white holes, they do dot belong here.

 

[radfx]

Alrighty, there are some fundamental flaws in your model. I'm by no means a super-expert on black hole theory, or conversely, white hole theory, but I'll try to explain the flaws as best as I could.

First off, matter and light entering a black hole is not "destroyed". You had the idea right until you used that word, basically, yes, it is compressed into the singularity, ie: if you could imagine that it is crushed from all directions until it is squeezed into an impossibly small dot, with no height, width or depth. Essentially, all the volume of the matter falling into the black hole is compressed into a zero-dimensional point, however, the mass remains, and increases the total mass of the black hole, and due to this, increases the gravitational pull of the black hole.

An extreme example of this, is let's assume that out of some cosmic fluke, a black hole that has one solar mass randomly (and yes, impossibly) forms within orbit around our sun. The sun and the black hole would have the exact same mass, and would attract each other, dancing in circles around each other until they were close enough that solar material was pulled into the black hole. As the material fell into the black hole, the physical size of the black hole would not increase, however, it's mass would, until it had completely consumed the sun, at which point it would have doubled in mass. This would increase it's gravitational pull, but the fact of the matter is that physically, it's still that zero-dimensional dot.

Now, as far as white holes, they are extremely intriguing, and physicists are already arguing about whether or not one may have been observed. Here is my theory regarding their possible existence. Black holes can last for millenia, white holes, if they can exist, probably only last for nanoseconds to minutes (as was the "potential white hole" gamma ray burst observed in 2006, which lasted for 102 seconds). We already know the black holes can collapse and destabilize. If this happens, and for whatever reason the gravitational field starts falling apart, could this not result in an explosion of the singularity, dumping all that condensed matter and information back into space? This could be a white hole, and while not necessarily the long sustained effect we see in a black hole, is quite possibly a solution to this problem without really interfering with the second law of thermodynamics... any thoughts?

 

[khemist]

I must confess, I really don't understand what you are trying to do. Prove that white holes do not exist?

Here is an interesting quote from wikipedia:

In quantum mechanics, the black hole emits Hawking radiation, and so can come to thermal equilibrium with a gas of radiation. Since a thermal equilibrium state is time reversal invariant, Stephen Hawking argued that the time reverse of a black hole in thermal equilibrium is again a black hole in thermal equilibrium.[3] This implies that black holes and white holes are the same object. The Hawking radiation from an ordinary black hole is then identified with the white hole emission. Hawking's semi-classical argument is reproduced in a quantum mechanical AdS/CFT treatment,[4] where a black hole in anti-de Sitter space is described by a thermal gas in a gauge theory, whose time reversal is the same as itself.

http://en.wikipedia.org/wiki/White_hole

This seems more like a philosophy discussion rather than scientific...

 

[Vanadium 50]

This thread is years old, and the OP is long gone.