1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Does the mod square of the wave function always have to be real?

  1. Jun 28, 2014 #1
    1. The problem statement, all variables and given/known data
    Doing a bit of QM from Griffiths intro to QM and got stuck early on on the following worked example:


    I was under the impression that the mod square of the wave function ψ(x,t) should always be a positive, real number, but I cannot understand where the isin(2πt/h(E2-E1)) has gone in the last line. Perhaps I'm missing some simplification using trig identities perhaps?

    2. Relevant equations

    3. The attempt at a solution
  2. jcsd
  3. Jun 28, 2014 #2


    User Avatar
    Homework Helper
    Gold Member
    2017 Award

    In the next to last equality of the example, there is a product of two expressions in parentheses. Show us what you get when you multiply this out.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted