| |||||||||
Charles Glover Barkla (June 7, 1877 ? October 23, 1944) was an English physicist. He was professor of natural philosophy at Edinburgh from 1913. For his discovery of the characteristic X-rays of elements he received the 1917 Nobel Prize in Physics. He evolved the laws of X-ray scattering and the laws governing the transmission of X rays through matter and excitation of secondary rays.