Spanky_Saville
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« on: June 27, 2011, 06:49:34 AM » |
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Black holes attract matter towards them with a force that grows irresistibly accelerating the stuff until it reaches lightspeed. At that point the miserable matter enters the event horizon and is never seen again.
But a giant black hole may have an event horizon of huge dimension, so the matter that falls in still has a way to go until the very center, where the singularity sits.
So the question is, between the event horizon and the very center, is the matter accelerating BEYOND the speed of light? Does that make time run backwards?
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Brandir
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« Reply #1 on: June 27, 2011, 12:04:26 PM » |
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no
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Quadrillian
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« Reply #2 on: June 28, 2011, 04:20:36 AM » |
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Definitely no.
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poldi
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« Reply #3 on: June 28, 2011, 09:16:10 AM » |
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Past the event horizon there is no way to know what laws of physics operate - the laws as we know them may not operate at all in that extreme environment. Faster than the speed of light, time reversal, anything is possible.
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Lola_F
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« Reply #4 on: June 28, 2011, 09:25:37 AM » |
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No body ever exceeds c as measured by any local observer, including within a black hole.
You're asking this question as if speed were an absolute. You make statements like "accelerating the stuff until it reaches lightspeed". Relative to what? You want to know whether something gets accelerated beyond light speed, but haven't specified relative to what, or as measured by whom.
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Yadata
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« Reply #5 on: June 28, 2011, 10:12:08 AM » |
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Check out http://www.youtube.com/watch?v=cW7BvabYnn8 which is a SpaceRip video I just picked at random off YouTube. The guy is kindatop nocth but the vid seems a little dull the video nice. I filmed it myself a few years ago but lost my camera to the black hole thing should have known.... |
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Morningfox
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« Reply #6 on: June 28, 2011, 11:43:31 AM » |
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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".
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Keep_Earth_clean_i
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« Reply #7 on: June 28, 2011, 12:01:01 PM » |
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No.Impossible.
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S
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« Reply #8 on: June 28, 2011, 12:34:08 PM » |
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Not quite.
Matter cannot accelerate beyond the speed of light. However, what's happening within the event horizon of a black hole is that space itself is being warped beyond the speed of light (which is why light cannot escape a black hole).
An analogy that astronomers use: Imagine space being the water in a reservoir, and in that water is a swimming man that represents light. He can only swim so fast. However, in the middle of the reservoir is a spillway. At a certain point, the water draining down the spillway is moving faster than he can swim. That is the event horizon. If gets to that point or any closer, he'll never be able to get out.
And to answer your question about time: It does not run backwards, but it does slow down.
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Mr__Immortel
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« Reply #9 on: June 28, 2011, 12:43:30 PM » |
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Only within the black hole itself. Only higher forms of energy can accelerate beyond the speed of light. Matter itself cannot be accelerated to light speed.
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