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Are 10 spatial dimensions necessary for M-Theory?

  1. Feb 29, 2012 #1


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    Hi Everyone,

    I have not understood or even studied string theory.

    However I was wondering whether the extra dimensions demanded by M-theory (10 spatial dimensions in that case), other string theories or even any other field theories necessarily demand the dimensions higher than four dimensions all are spatial.

    Is it the nature (mathematical) of those dimensions that demand such dimensions to be spatial?
    Or are remaining dimensions called spatial because we feel that would be easier to deal with/to explain and are more intuitive?

    Thank YOu
  2. jcsd
  3. Feb 29, 2012 #2


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    and yes, another question,
    does string theory explain quantum entanglement.
    Lots of questions, but last one,
    does test of bell's inequality necessarily require reality to be non local.
  4. Mar 1, 2012 #3


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    Science Advisor
    2018 Award

    Probably not, but see

    Not necessarily:
    https://www.physicsforums.com/blog.php?b=3622 [Broken]
    Last edited by a moderator: May 5, 2017
  5. Mar 2, 2012 #4
    If you want to understand Bell's theorem, so that you can make up your own mind about this, you can read the excellent explanation here. And if you have more questions about entanglement and Bell's theorem, you should ask them in the Quantum Mechanics forum.
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