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
Columbia University Physics Department x-ray transitions in muonic atoms. Richard Garwin and Leon Lederman observed parity nonconservation in pion and muon decay. Lederman, Schwartz, and Steinberger proved that the muon neutrino was distinct from the electron neutrino. Today, Columbia experimenters conduct work at labs across the world. These include CERN, in Geneva, Switzerland, Brookhaven National Laboratory, in Upton, New York, and Fermi National Accelerator Laboratory, in Batavia, Illinois. Pupin Labs also houses a 400-Gigaflops dedicated supercomputer built by Norman Christ, which is used for calculations in lattice quantum chromodynamics. Scientists who have received the Nobel Prize for work done while on faculty at Columbia