1. Limited time only! Sign up for a free 30min personal 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!

Wavefunction/mmomentum confusion

  1. Oct 19, 2009 #1
    wavefunction/momentum confusion

    1. The problem statement, all variables and given/known data
    Given a wavefunction [tex]\Psi[/tex]=Asin(cx) of an electron can i find it's momentum?

    2. Relevant equations
    Thats what i dont know.

    3. The attempt at a solution
    Wave function squared is the probability if finding the particle. So i'm given the probability of finding a particle in space how do i find momentum when momentum is dependant on time but the given wavefunction is not?
    Last edited: Oct 19, 2009
  2. jcsd
  3. Oct 19, 2009 #2


    User Avatar
    Homework Helper
    Gold Member

    What makes you think that the electron even has a definite momentum? In quantum mechanics, a wavefunction can be in a superposition of momentum eigenstates, and if the momentum is measured, each momentum eigenvalue will have some probability of being observed.

    What does the question really say? (word for word)
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook