13. Elec­tro­mag­net­ism

This chap­ter ex­plains how quan­tum me­chan­ics deals with elec­tro­mag­netic ef­fects.

Some more ad­vanced top­ics will be left to in­tro­duc­tory ad­denda. That in­cludes how the so­lu­tion for the hy­dro­gen atom may be cor­rected for rel­a­tivis­tic ef­fects, {A.39}, us­ing per­tur­ba­tion the­ory, {A.38}. It also in­cludes the quan­ti­za­tion of the elec­tro­mag­netic field, {A.23}, us­ing quan­tum field the­ory, {A.15}.

Elec­tro­mag­net­ics is closely tied to more ad­vanced con­cepts in an­gu­lar mo­men­tum and rel­a­tiv­ity. These have been dis­cussed in chap­ters 1 and 12.