- #1

MGWorden

- 3

- 0

## Homework Statement

Psi(x) = Ax -a<x<a

I am trying to find the probability that my measured momentum is between h/a and 2h/a

## Homework Equations

I have normalized A= sqrt(3/(2a^3))

I know that if I was finding the expected momentum I would use

[tex]\int[/tex][tex]\Psi[/tex] * p [tex]\Psi[/tex] dx

## The Attempt at a Solution

so far I have done

[tex]\int[/tex] [tex]\Psi[/tex] * p [tex]\Psi[/tex] dx

with bounds from from h/a and 2h/a

but I know this is the expected value of momentum and I don't think that is the same thing as the probability of momentum.

Could someone please explain the difference in finding the probability of momentum and the expected value of momentum. Or if they are the same thing let me know there is no difference.

Thanks for your time.