- #1
Niles
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Homework Statement
Hi all.
Let's say that i have a wave function
[tex]\Psi (x,t) = A \cdot \exp ( - \lambda \cdot \left| x \right|) \cdot \exp ( - i\omega t)[/tex]
I want to find the expectation value for x. For this I use
[tex]\left\langle x \right\rangle = \int_{ - \infty }^\infty x \left| \Psi \right|^2 dx[/tex].
Why must I set t = 0 when doing this?