# Position/momentum representation and probablity density

1. Sep 7, 2012

### Jesssa

Hey guys,

I have been trying to figure out the following problem but I have been having trouble working out the easier way to do it.

http://img821.imageshack.us/img821/1143/58921862.jpg [Broken]

I don't see how I can use the hint, "x is ihbar d/dp in the momentum representation".

I assume that the more difficult way is to actually evaluate the Fourier integral and then take the absolute value squared of the result.

Is there a shorter/simpler way to find the probability density of the momentum?

Thank you,

Last edited by a moderator: May 6, 2017