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

Extra spacial dimensions

  1. Dec 27, 2007 #1
    Hi, sorry if this is a daft question, but it's something i've often wondered about. why is it that the extra spacial dimensions in string theory have to be 'wrapped up' rather than extended like the 3 we experience? it seems to be that since we are 3D beings, 3 dimensions is the limitation of our perception - in the same way a 2D lifeform would have no perception of the 'Z' axis. Just because we don't experience more than 3 space dimensions doesn't mean that they're not there, does it?
  2. jcsd
  3. Dec 27, 2007 #2


    User Avatar
    Staff Emeritus
    Science Advisor
    Gold Member

    This is not about human ability to perceive dimensions. Physical laws reflect the dimensionality of the underlying space. Power laws seen in expressions for fields and currents would be different if the sources lived in greater or fewer (flat) dimensions.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?

Similar Discussions: Extra spacial dimensions
  1. Extra dimensions (Replies: 5)

  2. Extra Dimensions (Replies: 4)

  3. Extra Dimensions (Replies: 13)

  4. Extra dimension (Replies: 16)