[jeffreyH]

A photon, falling into a BH, crosses the event horizon without incident and is then inside the BH.
A distant observer sees the infalling photon as slowing, and never reaching the event horizon

You cannot see an infalling photon as it is moving away from you.

[jeffreyH]

It may be that the material inside a black hole is opaque to light. In the same way that the early universe was . That way gravity would never be able to accelerate anything to light speed since all particles would be impeded and not just photons. This would mean the singularity would never be reached due to the state of matter beyond the horizon. All speculatice, of course.

[guest45734]

It may be that the material inside a black hole is opaque to light. In the same way that the early universe was . That way gravity would never be able to accelerate anything to light speed since all particles would be impeded and not just photons.

In the early universe pre big bang, space time apparently did not exist as we know it. ie space time had not yet started to expand. Space time apparently breaks down inside a black hole ie it contracts everything including space time to nothing a notional singularity. Are you saying/speculating that dimensions of space time cease to exist inside a black hole. If this is the case what happens to matter inside a BH.

Can singularities occupying zero space hold all the mass of a BH? theoretical yes realistically matter would turn into plasma then radiation bosons at least can occupy the same space as other bosons ? . BUT inside the event horizon we don't know what is happening, multiple black holes could be orbiting each other etc etc

The laws of thermodynamics must still apply, if matter is compressed it gets hot, beyond a certain level it becomes a plasma, beyond this it is broken down to fundamental particles and radiation, then what. One theory is that the centre of a BH is supported by radiation, another is that the singularity leads to a wormhole like an ER bridge and another dimension connecting seperate locations in space. 

[guest46746]

Ref Singularities and missing dimensions at the point of the big bang expansion of space and time. Could the inside of a BH be similar in that time ceases to exist or time stops ticking forward for an object at  the assumed singularity at the centre of a BH.

B 2D is Space/Time, with acceleration it possess time and distance. Being devoid of light, it lacks 3D volume. Hope this does not confuse some! lol


New theory posting expounds on this concept further!  lol

[jeffreyH]

It was speculation so I can't back it up. Especially since information can't get out of a black hole. The concept of a black hole sounds a lot like the conditions before the big bang are said to have been. So opacity appears to be a natural assumption for the conditions inside a black hole. Along with extreme time dilation.

[guest45734]

It was speculation so I can't back it up. Especially since information can't get out of a black hole. The concept of a black hole sounds a lot like the conditions before the big bang are said to have been. So opacity appears to be a natural assumption for the conditions inside a black hole. Along with extreme time dilation.

I realize you were speculating. Basically no one knows for sure what resides inside a Black hole or what dimensions existed before the Big Bang. I think it comes down to what dimensions exist inside a BH, how big is the singularity. Ie Could the physical size of the singularity be defined by the event horizon or a pin hole some where in the middle of the BH, in either instance the observed effects would be the same. Basically if our sun collapsed into a BH today it would not affect the way the earth orbited it. Theoretical Hawking radiation allows information to escape from the BH to the event horizon and eventually for BH's to evaporate.

[Colin2B]

Is it possible all the mass of black holes exists in the event horizon, beyond which is a wormhole, where time and space do not exist as we know it.

From our distant frame will not see the mass going into the hole, we will see it frozen in time, but in the frame of the mass time is normal and so it can in theory pass over.

A link for numpties to get a clue at what I am driving at http://jila.colorado.edu/~ajsh/bh/schww.html

Excellent website, high on my list, I often recommend it to people.
However, numpties often don’t read the caveats Prof Hamilton places on wormholes etc, as he says they are unlikely to exist, or to be very unstable if they do.

Edit after some googling I came across gravitational geons, which might answer can gravitational energy be converted to matter question.

Wheeler and others did a lot of work on this but it was inconclusive, I remember Wheeler writing that he thought it was a dead end, others think there are stability problems. Until we have an accepted quantum gravity theory all this is still new theories territory.

[evan_au]

Some speculative theories have been moved out of this mainstream thread into "Do photons, neutrinos and dark matter have a structure?", see: https://www.thenakedscientists.com/forum/index.php?topic=75083.msg555106#msg555106
...moderator