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
Cavendish Professor of Physics something of a contradiction, dressing as a Victorian gentleman but working on the cutting edge of physics. Rutherford died suddenly in 1937, marking the end of an era for the Cavendish. Sir Lawrence Bragg became Cavendish Professor just before the outbreak of the Second World War, which resulted in many staff joining various defence research establishments, notably to develop radar. Work on neutron physics performed at this time was translated into the Manhattan Project to build an atom bomb. In 1971 it was renamed from the "Cavendish Professorship of Experimental Physics" to the "Cavendish Professorship of Physics". Until Brian Pippard