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Dimensional Question?

  • 30-01-2009 2:02pm
    #1
    mickeydevine
    Closed Accounts Posts: 112 ✭✭


    Compare a grain of sand to all the matter in the known universe. Could the same comparable mass from the 11th dimension (sand grain) translate to all the matter in our universe in the 3rd dimension.?


Comments

  • #2
    Professor_Fink
    Registered Users, Registered Users 2 Posts: 861 ✭✭✭Professor_Fink


    mickeydevine wrote: »
    Compare a grain of sand to all the matter in the known universe. Could the same comparable mass from the 11th dimension (sand grain) translate to all the matter in our universe in the 3rd dimension.?

    That seems a very odd question. I'm not quite sure what you mean, but the closest question I can think of that makes sense to me is as follows:

    If we live on a 3+1 (i.e. 3 spatial dimensions and 1 time dimension) dimensional surface of a higher dimensional space, is it possible to place an enormous amount of mass in this larger space in such a way that we retain our laws of physics.

    The answer to which is yes, provided you place it very far from the surface we live on. However if the dimensions are compact, as in string theory, then any extra mass should effect us in a noticable way.

    Hope this helps, but I may have misinterpreted what you were asking.


  • #3
    mickeydevine
    Closed Accounts Posts: 112 ✭✭mickeydevine


    Professor_Fink wrote: »
    That seems a very odd question. I'm not quite sure what you mean, but the closest question I can think of that makes sense to me is as follows:

    If we live on a 3+1 (i.e. 3 spatial dimensions and 1 time dimension) dimensional surface of a higher dimensional space, is it possible to place an enormous amount of mass in this larger space in such a way that we retain our laws of physics.

    The answer to which is yes, provided you place it very far from the surface we live on. However if the dimensions are compact, as in string theory, then any extra mass should effect us in a noticable way.

    Hope this helps, but I may have misinterpreted what you were asking.

    Yep, odd about covers it. I'm sorry I can't structure my questions in a better way Prof. Its more a brain fart if anything. I've got some real crazy theories that if we're to be written down could see the lads in white coats calling. I'm just trying to get answers in round about ways. Again though, much appreciated for the reply. You say in string theory that there's 11 dimension. The LHC could provide evidence of the fourth dimension, how do we prove the 5th, 6th etc.


  • #4
    Professor_Fink
    Registered Users, Registered Users 2 Posts: 861 ✭✭✭Professor_Fink


    mickeydevine wrote: »
    You say in string theory that there's 11 dimension. The LHC could provide evidence of the fourth dimension, how do we prove the 5th, 6th etc.

    Well, it should either give evidence for other dimensions or not, rather than finding a single extra dimensions. That said, it will only be exploring an energy range at which we expect not to see any extra dimensions, even if string theory is correct. You need incredibly high (possibly impossibly high) energies to directly test string theory.


  • #5
    mickeydevine
    Closed Accounts Posts: 112 ✭✭mickeydevine


    http://mkaku.org/home/?page_id=416

    Just read this article by Michio Kaku. I dont think I gave him enough credit before cause after reading his bio on wiki he is a seriously talented physicist.

    He describes the big bang by the 10 dimensions spliting into 4 and 6 dimensions, creating the big bang. Since I first read about other dimensions its kind of how I pictured it and tried to discribe in my question above. An interaction between dimensions caused the big bang. But that then leaves (if correct) where did the 10 dimensions come from.?

    How will the unified theory affect physics?. Will there be a need for theoretical physicists anymore?


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