millikan

noun

1. Robert Andrews,1868–1953, U.S. physicist: Nobel prize 1923.

noun

1. Robert Andrews. 1868–1953, US physicist. He measured the charge of an electron (1910), verified Einstein’s equation for the photoelectric effect (1916), and studied cosmic rays; Nobel prize for physics 1923

1. American physicist who measured the electron charge and experimentally verified Einstein’s equation describing the photoelectric effect. For this work he received the 1923 Nobel Prize for physics. Milllikan also proved the existence of (and coined the term for) cosmic rays.