Wavefunction/mmomentum confusion

1. Oct 19, 2009

Sasuke

wavefunction/momentum confusion

1. The problem statement, all variables and given/known data
Given a wavefunction $$\Psi$$=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. Oct 19, 2009

gabbagabbahey

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)