On Tuesday, November 5, 2019 at 6:03:02 PM UTC-7, Lawrence Crowell wrote:
>
> On Tuesday, November 5, 2019 at 8:22:54 AM UTC-6, Alan Grayson wrote:
>>
>>
>>
>> On Tuesday, November 5, 2019 at 6:46:46 AM UTC-7, Lawrence Crowell wrote:
>>>
>>> On Monday, November 4, 2019 at 7:56:55 PM UTC-6, Alan Grayson wrote:
>>>>
>>>> According to QM, does time stop at the event horizon of a BH? TIA, AG
>>>>
>>>
>>> There is no time on the horizon for particle geodesics on the horizon.
>>> These can only be photons, which as null geodesic particles have zero
>>> proper time.
>>>
>>> LC
>>>
>>
>> Isn't that a singularity of sorts; not one involving infinity, but still
>> a baffling result that time stops? What happens to time when one crosses
>> the horizon? AG
>>
>
> Crossing the horizon is a nonevent for the most part. If you try to
> accelerate so you hover just above it the time dilation and that you are in
> an extreme Rindler wedge will mean you are subjected to a torrent of
> radiation. In principle a probe could accelerate to 10^{53}m/s^2 and hover
> a Planck unit distance above the horizon. You would be at the stretched
> horizon. This would be almost a sort of singular event. On the other hand
> if you fall on an inertial frame inwards there is nothing unusual at the
> horizon.
>
> LC
>
Do you mean that clock rates continue to slow as an observer approaches the
event horizon; then the clock stops when crossing, or on the event horizon;
and after crossing the clock resumes its forward rate? AG
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