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

A Is the Plank length the same in every direction?

  1. Jul 28, 2017 #1
    while i understand what plank length is... Has it ever been measured on multiple axis? As an indicator of the granularity has the plank length (or second) been thus measured?
     
  2. jcsd
  3. Jul 28, 2017 #2

    phinds

    User Avatar
    Gold Member
    2016 Award

    That's like asking is one meter the same on multiple axes. Being a unit of measure, of course it is the same in every direction.

    The Plank length is, as I recall, something like 20 ORDERS OF MAGNITUDE smaller than our ability to measure.
     
  4. Aug 7, 2017 #3

    ohwilleke

    User Avatar
    Gold Member

    It appears that you do not understand what Planck's length is, because the Planck length is not something that is "measured". It is a quantity derived by combining several fundamental constants that are measured that dimensionally, when combined, give rise to a sole remaining dimension of length. It is determined without any physical context whatsoever. Specifically, the Planck length is the square root of a quantity equal to the reduced Planck's constant times Newton's constant divided by the speed of light cubed.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted



Similar Discussions: Is the Plank length the same in every direction?
Loading...