born Jan. 4, 1940, Cardiff, Wales
British physicist.
He received a Ph.D. from the University of Cambridge and began building on earlier work done by Leo Esaki of IBM and Ivar Giaever (b. 1929) of General Electric. For his discovery of what is now called the Josephson effect in superconductivity, he shared a Nobel Prize with Esaki and Giaever in 1973. He was elected a fellow of the Royal Society in 1970 and was named a professor at Cambridge in 1974.