- Yang, Chen Ning — (born 22.09.1922) is an American theoretical physicist and a member of the National Academy of Sciences (1965).
- Young, Thomas — (13.06.1773-10.05.1829) was an English scientist, one of the founders of wave optics, a Fellow of the Royal Society (1794) and its secretary in 1802-29.
- Yukawa, Hideki — (23.01.1907-08.11.1981) was a Japanese theoretical physicist and a member of the Japan Academy (1946).