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- TL;DR Summary
- If an observer is within the event horizon of a black hole, is there another horizon further in such that light/causality can't reach that observer?
The event horizon of a black hole is defined with respect to observers far away, and we know that light from within the horizon can't reach a distant observer.
But what if an observer is within the "main" event horizon? Presumably, there will be another horizon nearer to the center, such that light from within this horizon can't reach this observer? If so, is there a technical term for a "subjective" horizon defined wrt an observer located at a distance x inwards from the "real" or "absolute" horizon?
But what if an observer is within the "main" event horizon? Presumably, there will be another horizon nearer to the center, such that light from within this horizon can't reach this observer? If so, is there a technical term for a "subjective" horizon defined wrt an observer located at a distance x inwards from the "real" or "absolute" horizon?