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

Gravity Normal At Small Scales.

  1. Aug 22, 2005 #1


    User Avatar
    Gold Member

    A study of gravity at the 6-20 micrometer scale has found it to behave normally and experimentally constrained the scale of any small scale deviation from the Newtonian expectation.


    Hat tip to Motl for noting the paper.
  2. jcsd
  3. Aug 23, 2005 #2


    User Avatar
    Science Advisor
    Gold Member

    Isn't it amazing how difficult it is to test gravity at not-so-extreme limits? I've always thought so. 6-20 micrometers is enormous compared to most scales at which we test fundamental interactions. Kinda reminds me of the Planck mass.
  4. Aug 23, 2005 #3


    User Avatar
    Science Advisor

    If you want to learn more about these sorts of experiments *and they are really cool IMO* check out this page


    and for instance a review article on various ways of doing this experiment

    http://www.npl.washington.edu/eotwash/pdf/review.pdf [Broken]

    Basically all these experiments are like the famous Cavendish experiment in one shape or another. The more modern versions now use casimir forces to measure the deviation.
    Last edited by a moderator: May 2, 2017
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook