Can Space-Time Rip? What Causes Tears & Healing?

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    Rip Space-time
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Discussion Overview

The discussion revolves around the concept of whether space-time can rip, what might cause such rips, and the implications of these rips, including their appearance and potential healing. Participants explore theoretical aspects of space-time, particularly in relation to black holes and singularities.

Discussion Character

  • Debate/contested
  • Conceptual clarification
  • Exploratory

Main Points Raised

  • Some participants question the possibility of space-time ripping and seek to understand the causes and characteristics of such an event.
  • One participant asserts that space-time cannot rip, suggesting a definitive stance against the idea.
  • Another participant proposes that if "ripped" refers to an infinitely depressed state, then black holes could be considered as such, as they create regions where light cannot escape.
  • A different viewpoint suggests that the singularity at the center of a black hole indicates the limits of general relativity and the need for a theory of quantum gravity, cautioning against literal interpretations of rips or holes in space-time.
  • There is a discussion about the indistinguishability of singularities and rips, with some arguing that they behave similarly in terms of light behavior.

Areas of Agreement / Disagreement

Participants express differing views on the nature of space-time and whether it can rip. There is no consensus, as some firmly believe it cannot, while others explore the implications of black holes and singularities as potential analogs for ripping.

Contextual Notes

Participants highlight the limitations of current theories, particularly general relativity, in fully describing phenomena related to singularities and the potential need for a quantum gravity framework. The discussion also reflects uncertainty about the definitions of terms like "rip" and "hole" in the context of space-time.

DuckAmuck
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If so, what causes it to rip? Does it "heal"? What would a rip look like to us? What is the tension threshold at which spacetime rips? What are the units of this "tension"?
 
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I'm not so sure. I suppose it depends what you mean by ripped. If ripped = infinitely depressed, then I think the answer to this would be yes, as that's a black hole, a "depression" in space time that when light travels along a path through that singularity, it never comes out, presumably because it never reaches the "bottom" of the "depression". At least that's been my interpretation. With this in mind, a singularity would be indistinguishable from a rip. However, I don't think you can talk about "holes" in space-time, as that's pretty meaningless. (There's a region of ? where space-time doesn't exist, so either a region of space, where time doesn't exist, or a region of time where space doesn't exist, or a region of something where neither exists. Doesn't seem to make much sense.)
 
I think that the singularity at the centre of a black hole is general relativity's way of telling you that it can't describe what's going on there. We need a theory of quantum gravity to describe it properly. So I would be a bit cautious about interpreting it literally as a hole in spacetime.
 
Not literally, but indistinguishable. If you can differentiate the two. This singularity behaves as a hole would behave, in that light just sort of "disappears", as one would expect to happen with a rip.
Perhaps you are correct about the QG, but I think a proper description of the singularity (yet to come about) would suffice just as well. IMHO.
 

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