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Thread: Weak Force, Time travel, Gravitons

  1. #1 Weak Force, Time travel, Gravitons 
    Forum Freshman Tachyon's Avatar
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    3 questions:

    1)Why is it that the weak interaction only applies to left-handed matter? whats the mechanism behind it?

    2)What are your thoughts on a speculation that u can take a path between 2 close together moving black holes and u can end up in the past of when u started
    (Degrasse Tyson said that this was theoretically possible)

    3) If light cant escape from a black hole then how gravitons do? They will still have to follow the same distortion in spacetime.


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  3. #2  
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    1) Doesn't sound right - where did you get the idea?

    2) I'll ignore.

    3) The gravitons are not escaping from the black hole. The gravitational effect is due to the fact that to an outside observer the black hole never quite forms.


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  4. #3  
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    1) Yeah, that's right.I've been trying to wrap my head around the weak interaction for a while and that still seems strange to me. I don't know the reason that it applies to left-handed SPIN ( intrinsic QM spin not angular momentum spin ) particles only
    2) In the past of your own universe or of a totally different universe, The penrose diagrams don't specify. It's all conjcture and won't be proven or disproven anytime soon ( still waiting on a quantum gravity theory ).
    3) Gravitons haven't been detected, they are theorized. Our best theory of gravity says that mass/energy warps space/time and this curvature of space/time is the effect of gravity. But if we consider the graviton, does it need to escape the event horizon to warp the local space/time?? And ( I'm out of my depth here ) what if gravitons only manifest themselves at Planck scale energies, but once the scalar field which gives rise to a false vacuum energy collapses, symmetry is broken, and the true lower energy vacuum is estabilished, the quantum gravity graviton may disappear and be replaced by a totally classic , GR, gravity.
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  5. #4  
    Forum Freshman BlueBook's Avatar
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    Quote Originally Posted by MigL
    ( still waiting on a quantum gravity theory )
    I don't think we'll have that anytime soon...
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  6. #5  
    Forum Freshman Tachyon's Avatar
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    Quote Originally Posted by mathman
    1) Doesn't sound right - where did you get the idea?
    Wikipedia said so and the guy after your post confirmed.

    Quote Originally Posted by mathman
    3) The gravitons are not escaping from the black hole. The gravitational effect is due to the fact that to an outside observer the black hole never quite forms.
    This seems like a wierd explanation, is the gravitational effect of the sun because it never quite forms? Shouldnt the explanations be basically the same weather its a star or a black hole?
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  7. #6  
    Forum Freshman Tachyon's Avatar
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    3) Our best theory of gravity says that mass/energy warps space/time and this curvature of space/time is the effect of gravity.
    Yeah i've heard this but doesnt it lead to a problem:
    If earth is like in a valley of spacetime curved by the sun and we are in a smaller valley curved by earth and we are kind of falling down then the whole concept of it is explained via the intuition that we are supposed to fall "down" from the upper edge of the valley to the bottom of it. (hope its not too confusing)
    So we are explaining gravity with gravity
    Isnt that why we need some mediators like Gravitons to get a better explanation
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  8. #7  
    Forum Radioactive Isotope MagiMaster's Avatar
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    You're taking that valley analogy way too literally.
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