The subjects of these courses must be in three different sub-fields of physics, and must not include the core courses. An example of a set of courses that would completely satisfy this requirement would be Particle Physics I, Introduction to Solid State Physics, and General Relativity I. Students who have had graduate experience elsewhere may apply to the Graduate Coordinator for permission to count courses taken at other institutions for this requirement. The previous requirements were more complicated. Students who had started collecting credits towards those requirements can use either the old rules or the new ones, whichever they prefer. To check your personal situation please contact the Graduate Coordinator.
Students are, of course, encouraged to take more courses than the minimum.
In particular, their supervisory committee should check that their courseload is consistent with gaining a broad education in physics as well as a thorough knowledge of their sub-field.