John Clarke Slater (December 22, 1900 – July 25, 1976) was a noted American
physicist who made major contributions to the theory of the electronic structure of atoms, molecules and solids. This work is of ongoing importance in chemistry, as well as in many areas of physics. He also made major contributions to microwave electronics. He received a B.S. from the
University of Rochester in 1920 and a Ph.D. in Physics from
Harvard in 1923, then did post-doctoral work at the universities of
Cambridge (briefly) and
Copenhagen. On his return to the U.S. he joined the Physics Department at Harvard.