PS a statement of purpose that describes your demonstrated potential for success in advanced physics research. GPA Have a grade point average (GPA) of at least 3.0 on a scale of A = 4.0, computed for the last 60 semester hours (90 quarter hours) of undergraduate work and a minimum GPA of 3.5 for previous graduate degree work, as required by the Graduate College.  Fee The fee is US$70 for domestic applicants and US$90 for international applicants. RL invite three referees (prior physics instructors or research supervisors) to submit letters of reference on your behalf. Transcript Upload as part of your online admissions application.