1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Heisenberg Uncertainty Principle - h/(4.Phi) versus h/(2.Phi)

  1. Mar 3, 2005 #1
    Heisenberg Uncertainty Principle - h/(4.Pi) versus h/(2.Pi)

    What's the reason behind the factor 2 in the way some books/papers present Heisenberg Uncertainty Principle?
    h/(4.Pi) versus h/(2.Pi)
    When in history did this discrepancy arise and who was responsible for that?
    Ultimately, which figure should we use when we are solving HUP problems?
    Last edited: Mar 4, 2005
  2. jcsd
  3. Mar 3, 2005 #2
    I think you mean [itex]h/4\pi[/itex] and [itex]h/2\pi[/itex]. I would refer you to http://en.wikipedia.org/wiki/Uncertainty_principle which provides an excellent description of the general uncertainty principle and also explains why the two reults are often quoted. The more correct one is [itex]h/4\pi[/itex].
  4. Mar 7, 2005 #3


    User Avatar
    Science Advisor
    Homework Helper

    The correct one is with [tex] \frac{\hbar}{2} [/tex] as it can be shown starting with the general uncertainty relations.

    Any other constant is incorrect.

Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?

Similar Discussions: Heisenberg Uncertainty Principle - h/(4.Phi) versus h/(2.Phi)