PhD StudentContact Informationyiyund@uw.eduB157Courses Taught Spring 2020 PHYS 123 AB: Waves PHYS 123 CJ: Waves Winter 2020 PHYS 123 AF: Waves PHYS 123 BJ: Waves Summer 2019 Full-term PHYS 123 AB: Waves PHYS 123 AC: Waves