The event horizon of a black hole is the point at which radio communication or other forms of radiation such as light cannot escape. However, this point changes as you approach the black hole.
According to Wikipedia "all event horizons appear to be some distance away from any observer, and objects sent towards an event horizon never appear to cross it from the sending observer's point of view".
In addition, "other objects that had entered the horizon along the same radial path but at an earlier time would appear below the observer but still above the visual position of the horizon, and if they had fallen in recently enough the observer could exchange messages with them before either one was destroyed by the gravitational singularity".
If you are at a position outside of the event horizon, you can communicate with a position just outside the event horizon. However, if I understand correctly, from that position the event horizon will be different (closer to the black hole). Therefore, this position could communicate with something even closer to the black hole, just outside of the closer event horizon.
Couldn't that chaining process then be continued to get communication closer and closer into the black hole?
According to Wikipedia "all event horizons appear to be some distance away from any observer, and objects sent towards an event horizon never appear to cross it from the sending observer's point of view".
In addition, "other objects that had entered the horizon along the same radial path but at an earlier time would appear below the observer but still above the visual position of the horizon, and if they had fallen in recently enough the observer could exchange messages with them before either one was destroyed by the gravitational singularity".
If you are at a position outside of the event horizon, you can communicate with a position just outside the event horizon. However, if I understand correctly, from that position the event horizon will be different (closer to the black hole). Therefore, this position could communicate with something even closer to the black hole, just outside of the closer event horizon.
Couldn't that chaining process then be continued to get communication closer and closer into the black hole?