# Expectation value question

1. Nov 16, 2008

### kasse

If $$\Psi (x,t) = \psi (x) g(t)$$, should I then use $$\Psi$$ or $$\psi$$ when calculating $$<p>$$ and $$<p ^2>$$?

2. Nov 17, 2008

### PullMeOut

you should use the $$\Psi(x,t)$$ while calculating expectation value
it should include t parameter