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Originally Posted by xelasnave
Steven said.......
GR predicts a totally different scenario. To the observer the probe will reach a maximum velocity at 3 times the radius of the event horizon. Assuming the probe is not destroyed by tidal forces, it will then slow down and come to a grinding halt at the event horizon.
Alex's question.........
I presume the slow down is observational  .... I have heard of this early in my black hole reading and assummed it was observational but reading the next bit  ............anyways observational or does GR say it literally stops??? |
The effects are all relative to the observer of the probe. The frequency of an atomic clock on the probe at the event horizon is equal to zero. So yes time does in effect stop.
On a lesser scale we see the same effect on Earth. Atomic clocks run faster at higher altitudes.
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You then said.......
This is tied in with gravitational redshift. An object at the event horizon is literally frozen in time. The information is still there as it hasn't crossed the horizon and never will.
Is this not observational... the way I though it worked was the light leaving an object about to cross over (at a point which is not the issue) was held back by the gravity such that the "illusion" was that the object seemed to slow up...
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There is nothing illusional.
Gravitational redshift/blueshift has been experimentally verified. Atoms can absorb photons of a certain frequency. Suppose a test is set up to show absorbance with the source of the photons and the atoms separated by a horizontal distance X. Horizontally the source and atoms are at the same gravitational potential. If the test is repeated but the source and the atoms are separated by a vertical distance X instead, absorbance no longer occurs. This is because the source and atoms are at a different gravitational potential and the photons have shifted in frequency.
A change in frequency results in a change in time it takes the photon to reach it's destination. This is the mechanism for time slowing down in a higher gravitational potential.
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If it is not observational and the information is litterally frozen in time will that not support my proposition that not even gravity can leave ...
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I have no idea what you're on about Alex. Gravitational potentials are time independant.
Regards
Steven