To what speeds do physicists and astronomers think a black hole can accelerate matter?

Question

After all, we know from basic relativity theory that nothing can reach the speed of light, save the fundamental forces of the universe. Are we talking really really close to light speed? Ninety-nine percent-ish? Or more like fifty or ten percent? Thanks, just thought I'd throw this one out there.

Answer 1

Cosmologist believe black holes exist.No one has been able to indicate other wise,since no one has ever seen a black hole.
If such a mass would exist and it would be immensely dense ,then a light particle would be accelerated to a speed exceeding the standard known speed of light.
Your statement about Special relativity saying that nothing can be accelerated at greater than the speed of light is correct. However special relativity never took into account black holes as having super mass densities.
So both ideas are not exactly in agreement if we apply both theories of physics.
Presently Dark matter is believed to be responsible for accelerating the expansion of the Universe at speeds greater than the speed of light.Perhaps they may have good experimental and observational data to prove it.
The dark matter postulation was based on Einstein's long forgoten cosmological constant that he had introduced in the theory of General relativity.
If black hole theorethical assumptions were true and a large and very dense black hole existed somewhere at the center of mass of the Universe, it would follow that the universe would experience not an expansion ,but an inverse expansion.
Not all Physisits and atronomers have the same reservation conscerning black holes and what causes acceleration.
Einstein by definition Understood acceleration as a Gravitational field which followed the curvature of a space time manifold.The theory of general relativity never took into account temperature changes in the Universe as a function of Gravity.
A different theory(quantron) indicates that gravity is an external phenomena of space structure. That black holes if they are an existing supermassive structures ,they would be held together by a gravity pressure proportional to The energy content of the Black hole divided by its volume.Here Newton's 3rd law would apply.
All theories concerning the mysteries of the Universe have something to offer for deciphering them.
There are no right or wrong theories in Physics unless proven by experimentation to be otherwise.

Answer 2

Black holes do not accelerate matter. The gravitational field of a black hole is so strong that light can not escape it. Yes there are particles out there that reach close to the speed of light but based on Einstein's general relativity nothing is faster then the speed of light.

Answer 3

A celestial body whose surface gravity is so strong that not even light can escape once trapped. Remember a black hole is invisible. So if light cannot escape, nothing else can, according to Einstein's theory of relativity. A French mathematician, Pierre Simon de LaPlace agreed with Isaac Newton that light is composed of particles. A way to identify a black hole is gas from a star nearby is flowing towards a black spot at the speed of light.

Answer 4

speeds physicists astronomers black hole accelerate matter

Answer 5

Small things like electrons can be accelerated to that sort of speed. Bigger things not so fast. You can tell things are being accelerated by the gamma radiation that black holes generate.

Answer 6

Velocity is always a relative thing. For someone outside the BH, it depends on how far away from the hole the object started at. There is technically no way to talk about 'relative to the BH' since a BH is more of a rip in spacetime than anything else.

Answer 7

No. The paths of objects near and inside the event horizon are very weird. Inside the event horizon [EH], things still move at less than light speed. But time itself moves toward the center. That is to say, there is no way anything can move (or stay still) inside the EH, except by getting closer to the center. The only way to understand this is to study general relativity, and the maths of things called "world-lines".

Answer 8

From the point of view of a distant observer (i.e. one who is beyond the gravitational pull of the black hole), matter could be accelerated to almost the speed of light (i.e. 99.999% ish).

Answer 9

Theoretically, I think the only limit is c. I can't see why it would be anything less.

Answer 10

the speed of light.