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

E Folds

  1. Nov 17, 2014 #1


    User Avatar
    Gold Member

    How do E Folds relate to real distance?
  2. jcsd
  3. Nov 17, 2014 #2


    User Avatar
    Gold Member

    e-folds number is giving you a measure of the expansion ...
    I am not sure if they will in general relate to any real distance (what do you mean by real distance?)...maybe with the Horizon growth during inflation...
  4. Nov 17, 2014 #3


    Staff: Mentor

    One "e-fold" means the universe has expanded by a factor of ##e## (the base of natural logarithms, 2.71828...), so all distances between comoving objects have increased by the same factor.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook