Perturbation methods Video 9 of 10.

In this video I demonstrate how to use Rayleigh-Schrodinger perturbation theory to approximate solution for problems that deviate slightly from known solutions. Although only the non-degenerate case is shown, it is possible to expand this to the degenerate cases following examples given in common textbooks. As an example, the effect of gravitational attraction between the proton and electron in a hydrogen atom is approximated. This is video 9 of the 10 part series.