meta user
network profile
| bio | website | |
|---|---|---|
| location | ||
| age | ||
| visits | member for | 9 months |
| seen | May 12 at 18:36 | |
| stats | profile views | 18 |
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May 11 |
answered | Why is $r'/r^2 = -1/r$? |
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May 11 |
answered | Mass in special relativity |
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May 10 |
comment |
Why can't you escape a black hole? There are already several detailed explanations posted answering this question. If you want another one, surfaces of constant radius inside a black hole are spacelike, therefore to turn around you would need to travel faster than the speed of light, therefore you can't escape. |
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May 10 |
comment |
Why can't you escape a black hole? There is no such point inside a black hole where you would need to travel at less than c to escape, so you're answer is still completely wrong. Once you enter a black hole, you can't even turn around, much less escape. |
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May 10 |
comment |
Why can't you escape a black hole? I'd like to downvote but don't want to lose points. Anyway, this answer is completely wrong. |
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May 1 |
awarded | Teacher |
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Apr 29 |
answered | How is the hamiltonian a hermitian operator? |
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Mar 27 |
accepted | Can you enter a timelike hypersurface? |
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Mar 27 |
comment |
Can you enter a timelike hypersurface? Ah, ok I see, that was silly. The normal part will contribute positively to the norm of the vector, but the tangential part will make it overall negative. |
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Mar 27 |
asked | Can you enter a timelike hypersurface? |
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Mar 27 |
comment |
Diving into a charged (Reissner-Nordstrom) Black hole Yes, that helps, thanks. When you say you arrive in a new spacetime patch upon exiting the black hole, do you mean he is in a different universe, or just not where in spacetime he was before? For someone observing something leaving the black hole, is it still a black hole for him? or is it just a white hole, so that he can't get in? The diagram seems to suggest it is a different universe...will two people following a similar path necessarily end up in the same universe, or is this even possible to say? |
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Mar 26 |
revised |
Diving into a charged (Reissner-Nordstrom) Black hole added 1 characters in body |
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Mar 26 |
accepted | Future light cones inside black hole |
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Mar 26 |
asked | Diving into a charged (Reissner-Nordstrom) Black hole |
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Mar 22 |
awarded | Commentator |
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Mar 22 |
comment |
Future light cones inside black hole That's a pretty good answer, though I still don't see how you can see this from the Schwarzschild metric. |
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Mar 22 |
comment |
Future light cones inside black hole I see, however I don't see why the coordinate that gets a negative sign in the metric necessarily implies you can only move in one direction in that coordinate. On the other hand, can't I apply the same reasoning as you did to the time coordinate to infer that inside a black hole you can freely travel back and forth in time? |
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Mar 22 |
comment |
Future light cones inside black hole Can you expand on this? I have a rough idea of what you mean, but am unsure. |
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Mar 22 |
asked | Future light cones inside black hole |
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Feb 22 |
comment |
Does gravitational redshift imply gravitation time dilation? Yes I'm fine with that part, my question is with regards to time dilation. |
