Charles Glover Barkla (June 7, 1877 – October 23, 1944) was a British physicist.
He was born in Widnes and studied at the Liverpool Institute and Liverpool University. In 1913, after having worked at the universities of Cambridge and Liverpool, he was appointed professor of natural philosophy at the University of Edinburgh, a position he held until his death.
He evolved the laws of X-ray scattering and the laws governing the transmission of X rays through matter and excitation of secondary rays. For his discovery of the characteristic X-rays of elements he received the 1917 Nobel Prize in Physics. He was awarded the Royal Society's Hughes Medal that same year.
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