Uncertainity principle Definition and 53 Threads

  1. L

    Undergrad Fourier transform and uncertainity principle

    To find the frequency, Why do you need to consider the signal over long period of time? For example - if you look at a sine wave from 0-360 with two cycles, isn't it enough to get the frequency? I get the second part - you need a short time window to see sudden changes in frequency.
    • likephysics
    • Thread
    • Fourier Fourier transform Principle Transform Uncertainity principle
    • Replies: 9
    • Forum: Quantum Physics
  2. G

    Graduate Uncertainty Principle: Position Uncertainty of Electrons

    In application of uncertainity principle i read,if we suppose electron in a sphere of radius r then we assume unertainity of position as delta 'r',instead of taking diameter as uncertainity.Though it will not effect the calculations at all,but conceptually and physically what could be the reason...
  3. I

    Help Uncertainity principle problem

    in my problem i am told that the x-component of the velocity of a 2x10^-4 kg mass is measured to an accuracy of +_ 10^-6 m/s. i need to find the limit of the accuracy with which the particle can be located along the x-axis. the uncertainity principle delta(x) * delta(Px)>= h/4pi i have...