- #1

Telemachus

- 835

- 30

Well, I found at wikipedia that an axial multipole has an electric potential given by:

[tex]\Phi(r)=\frac{1}{4\pi \epsilon_0 r}\sum_{k=0}^{\infty}qa^k \left ( \frac{1}{r^{k+1}} \right ) P_k(\cos\theta)[/tex]

But I don't know how to apply this to my problem. I don't know neither what the zonal armonics are.