Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Does String Theory tell us the size of Extra Dimensions.

  1. Jul 22, 2013 #1
    Does the math in string theory tell us anything about the size of any of the extra dimensions?
  2. jcsd
  3. Jul 22, 2013 #2
    no so much.

    for one thing there are many models with varying 'extra dimensions'....sometimes
    Calabi-Yau [which I think are small, 'compactified'] and other times branes [bigger] and sometimes a mix....Then there is an ADD model with large extra dimensions.

    Some discussion on extra dimensions here:


    edit: a discussion with some background...no precise answer...here:


    This discussion brings out some of the complexities in addressing your question
    Last edited: Jul 22, 2013
  4. Jul 22, 2013 #3
    To a first approximation, string theory in its current form tells us nothing. Instead, you tell it what you want.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook