Black Holes?

Question

Its been said that nothing can escape from Black holes ,not even light ! but on contrary we also say what black holes cant consume buldges out in form of white super hot X Ray. Can someone clear this out Pls

http://www.youtube.com/watch?v=Y4ZDEdgtoDY for Curious PPls

Answer 1

it's called Hawking radiation, first thought of by steven hawking, with that crazy voice of his.

it draws from quantum physics, which says that in space, there are tiny little pairs of particles and anti-particles that pop into existence, made from energy using e=mc^2, and they quickly annihilate each other and turn back into energy. this happens all the time, on a subatomic level.
BUT if this should happen close to the border of a black hole, it's possible for one particle to be sucked into the black hole, while the other one escapes. to the outside, it will look like a highly-energetic particle has been emitted from the black hole, appearing as an xray. hawking even said that because it looks like the particle is coming from the black hole, the black hole loses some energy (half the energy that was used to make the pair), and the black hole will eventually evaporate.
there is still much debate about this; whether a black hole will eventually evaporate (long after it runs out of food), or whether it is perpetually stable.
it has nothing to do with "what black holes can't consume" though. they consume everything. it has to do with these quantum matter-antimatter pairs that appear and disappear.
and there is another way for black holes to evaporate: quantum tunneling, which i talked about in another answer today.

Answer 2

The question of Black Holes have been debated over many years ever since the proposal of this theory many years ago by Einstein. I believe in 1916?
http://en.wikipedia.org/wiki/Black_holes
All the answers concerning the emission of X-rays seems correct. But let's look at this oddity called the 'Black Hole'. A condition where time and space is so distorted that once you fall into it you disappear from this Universe all together. A place of 'no time' or 'no space'. It is extremely interesting that this Universe began from such a condition. That given the right circumstances matter can go back to that place.
hmmm.... maybe we have something here..

Thanks for you question

Answer 3

Yes it does emit X-rays... but only if it has not crossed the "event Horizon" of black hole. Event Horizon is the point from where even the light can not escape. When the material sucked by black hole the gases are accelerated to nearly speed of light. The gases are so hot that they start emitting x-rays perpendicular to the plane of gas rotation. X-rays are not "really" emitted by black hole itself, but by the gases close to the black hole which are about to cross the even horizon.. I hope this helps..

Answer 4

Not everything that falls into the black hole reaches the singularity. Much is thrown off in polar jets at ultra-high speed. Imagine trying to fill a dog dish with a fire hose, this is where the X-Ray emmitions come from.

Answer 5

As particles spiral into a black hole at millions of miles per hour, they are superheated and begin to emit powerful x-rays. They are still far enough from the black hole that the x-rays are allowed to escape.

Answer 6

ive never heard that black holes end out super hot xrays when they cant consume something.
but i do know that black holes slowly emit energy over time until they shrink to nothing. (takes billions and billions of years)

Answer 7

The radiation comes from the frictional heating of in-falling matter.
It doesn't come from the hole itself, but is generated outside it.
Wiki 'accretion ring`

Answer 8

i didnt no that those were real!!