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Homework Help: Expectation Value in Inf. Box in an Eigenstate

  1. Dec 15, 2008 #1
    1. The problem statement, all variables and given/known data
    Obtain an expression for the expectation value <Pxn>n N=1,2.... of a particle in an infinite box ( V=[tex]\infty[/tex] for x<0 and x>L ; V=0 for 0<X<L) which is in an eigenstate of the energy.

    2. Relevant equations
    Pn =+- [tex]\sqrt{2*m*En }[/tex] = +- (n*pi*Hbar) / L

    3. The attempt at a solution
    I don't know how to approach the problem because I am not sure what the notation of P is in the question. I included that formula because it is the closest formula I could find.

    How can I approach this? Thanks.
  2. jcsd
  3. Dec 15, 2008 #2
    We need it for tomorrow.
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