The department of the physics is an oldest department of Govt. Postgraduate College Dera Ghazi Khan (Ghazi University). Postgraduate classes were started in 1995 and BS. classes in 2010. The aim and mission of the department is to produce the graduates having caliber, knowledge and skills which are needed for development of country. There are different laboratories, including undergraduate laboratory, modern physics laboratory, electronics laboratory, and advanced electronics laboratory have been maintained in this department to meet the requirements of students.