# Azimuthal Wavefunctions: Showing a constant must be an integer

1. May 11, 2009

### lms_89

1. The problem statement, all variables and given/known data
In spherical polars, the azimuthal part of the wavefunction of a particle is

psi(phi) = 1/sqrt[2.pi] . exp[i.m.phi]

where phi is the azimuthal angle. Show m must be an integer.

2. Relevant equations
I know you are supposed to have a good go at solving the problem first, but this doesn't seem the sort of question you have an equation for. I've tried googling, and asking my friends, and thinking about it, but am panicking a bit because my exam is tomorrow and I still don't know what to do!

3. The attempt at a solution
See above! Any suggestions of even how to start would be really helpful :)

2. May 11, 2009

### Cyosis

It follows from the boundary conditions on a sphere $\psi(0)=\psi(2\pi)$. Try to find all values for m for which those boundary values hold.

Last edited: May 11, 2009
3. May 11, 2009

### lms_89

Ah ok, thanks. I'll have another think about it :)