- Although physics was originally taught for pre-medical students, it became a full-fledged program under the Physics Division, led by Professor Abraham Press (appointed in 1924).
- In 1930, the Faculty of Arts and Science introduced a three-year diploma in science education.
- By 1934, a Bachelor of Science in Physics program was approved under the Chulalongkorn University Act. Diploma holders could complete the degree with just one additional year of study.
- Chulalongkorn University became Thailand’s first institution to offer a physics degree program.
- In 1935, the first class of physics graduates (and graduates in other science disciplines)—seven in total—received their degrees from Prince Arthit Thip-apa, representing the King.
- That same year, the new Science Building (later renamed Physics Building 1) was inaugurated, becoming an enduring symbol of the department.