Einstein, time reversals and black holes
Recovered historical discussion from Einstein, time reversals and black holes.
I have a question that is indirectly linked to what happens inside of a black hole. I know the standard answer is that it is undefined, however I would like to take a different approach.
Lets take a 1 d diagram with a stong gravitational source ( OK a Black hole ) that looks like this:
--------X----------------EH----------Singularity
Where X is an infaller
EH is the EH
and Singularity is the Singularity
Now for a distant observer as X approaches the EH the infallers time will appear to stop. At the EH time appears to stop.
The natural progression is that the flow of time would be negative after the EH or would it just be imaginary? or just undefined.
If it is negative ... what would that mean?
for dx/-dt = -dx/dt ... which should mean that relative to the distant observer ( although he could never observe it ) X's velocity is in the direction of the EH and not the singularity right? Locally the infaller is rushing to the singularity at full speed.
Now one may say that if time is stopped at the EH then from the prospective of the distant observer nothing can fall past the EH ... however with that being said there are ways of getting past hte EH ...
1) at the collapse of a star at the point where the mass density is above the critical density to form a black hole most of the mass is already inside of the EH ....
2) as a black hole attracts more mass the potential gravity of the new mass will make the EH expand past the mass at the EH ... Although time is stopped at the EH the EH is expanding outwards.
Archived source: https://web.archive.org/web/20101204201156/http://www.spacetimeandtheuniverse.com/against-mainstream/3536-einstein-time-reversals-black-holes.html