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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

    gabbagabbahey

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    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)
     
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