On 11/5/2019 9:09 PM, Alan Grayson wrote:
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
He means the infalling clock doesn't slow down at all. Whenever you
see the word "clock" in a discussion of relativity it refers to an
/*ideal clock*/. It runs perfectly and never speeds up or slows down.
It's called /*relativity*/ theory because observers /*moving relative*/
to the clock /*measure it*/ to run slower or faster than their (ideal)
clock.
Brent
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