Do Laws of Physics Break Beyond the Event Horizon in Kerr Black Holes?

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Discussion Overview

The discussion revolves around the behavior of physical laws in the context of Kerr black holes, specifically whether laws of physics break down at the event horizon or only at the singularity. Participants explore the implications of general relativity and quantum mechanics in these regions.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • Some participants question whether all laws of physics break only at the singularity or if they also break down after the event horizon.
  • One participant explains that the singularity is a mathematical point of infinite density, while the event horizon is described as a "point of no return" for light and other matter.
  • Another participant asserts that both quantum mechanics and general relativity are valid beyond the event horizon.
  • A participant raises the idea that the frame-dragging effect in Kerr black holes may continue beyond the event horizon towards the singularity, although they note conflicting images of light paths entering the black hole.

Areas of Agreement / Disagreement

Participants express differing views on the validity of physical laws beyond the event horizon, with some asserting that they remain valid while others question this. The discussion does not reach a consensus on the nature of physical laws in these regions.

Contextual Notes

There are unresolved assumptions regarding the behavior of quantum mechanics and general relativity in extreme gravitational fields, as well as the interpretation of frame-dragging effects in Kerr black holes.

spidey
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are all laws of physics break only at singularity Or laws of physics break even after event horizon?what is the difference
 
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The singularity is the point (and it is important to understand that it is a mathematical point -- it has no dimensions) at which density becomes infinite. Clearly, shoving anything into zero volume will produce an infinite density. This is where modern physics begin to have a problem.

The event horizon, on the other hand, is a fictitious radius around the black hole at which not even light would be able to escape in any fashion. This represents a "point of no return" because, as nothing can travel faster than light, nothing can escape the fate of falling into the black hole beyond this radius.
 
Nabeshin said:
The singularity is the point (and it is important to understand that it is a mathematical point -- it has no dimensions) at which density becomes infinite. Clearly, shoving anything into zero volume will produce an infinite density. This is where modern physics begin to have a problem.

The event horizon, on the other hand, is a fictitious radius around the black hole at which not even light would be able to escape in any fashion. This represents a "point of no return" because, as nothing can travel faster than light, nothing can escape the fate of falling into the black hole beyond this radius.

Is quantum mechanics valid beyond event horizon?
 
Yes, so is general relativity.
 
In respect of Kerr black holes, I'm assuming the frame-dragging effect would also carry on beyond the event horizon towards the singularity. I would normally assume this was the case though I've seen some images of light paths that show the light/frames entering the black hole perpendicular to the event horizon regardless of the extremity of the frame-dragging.

Steve
 

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