Cavendish Professor of Physics the university regulations which allowed students who had not studied at Cambridge to receive a B.A. by submitting a thesis which was judged "of distinction as a record of original research." Among the students attracted by this change was future Cavendish Professor Ernest Rutherford. Whilst Thomson was Cavendish Professor, he discovered the electron and the existence of isotopes, and also fostered an atmosphere of friendliness and mutual helpfulness. Rutherford returned to Cambridge in 1918, and spent the last 19 years of his life there. This was around the time of the change from classical to modern physics, and Rutherford was
The Racah Institute of Physics Rakavy. Two of Racah's students, Amos de-Shalit and Igal Talmi, became the world leaders in theoretical nuclear spectroscopy. They founded the nuclear physics department at the Weizmann Institute in Rehovoth. As mentioned, experimental physics was carried out from the late 1920s, first by Sambursky in atomic spectroscopy then by Alexander and Wolfson in X-ray spectroscopy, crystallography and optics. In 1950 William Low (Ze'ev Lev), who was a student of Charles Townes in the United States, joined the experimental physics. He started new fields of research in Jerusalem. Starting to work on microwaves, he then set up a laboratory for magnetic