In this series of physics lectures, Professor J.J. Binney explains how probabilities are obtained from quantum amplitudes, why they give rise to quantum interference, the concept of a complete set of amplitudes and how this defines a "quantum state". A book of the course can be obtained from http://bit.ly/binneybook
http://www-thphys.physics.ox.ac.uk/people/JamesBinney/qm_synopsis.html
020 Further Orbital Angular Momentum, Spectra of L2 and LZ
Twentieth lecture in Professor James Binney's Quantum Mechanics Lecture series given in Hilary Term 2010. Creative Commons Attribution-Non-Commercial-Share Alike 2.0 UK: England & Wales; http://creativecommons.org/licenses/by-nc-sa/2.0/uk/