Im doing a research degree and it is on light scattering (mie scattering) from mircon sized particles. I need help finding out to prove mathematically that the far field scattering amplitude is only dependendent the angle theta and not the azimuthal component. (that is in normal spherical coordinates) In most books it is just states that for a spherical particle the scattering is only theta dependent. Any help is very much appriciated!!!