The physicist who won the 1917 Nobel Prize in Physics for the discovery of Characteristic X Rays was of what nationality?
Characteristic X-ray Characteristic X-rays are emitted when outer-shell electrons fill a vacancy in the inner shell of an atom, releasing X-rays in a pattern that is "characteristic" to each element. Characteristic X-rays were discovered by Charles Glover Barkla in 1909, who later won the Nobel Prize in Physics for his discovery in 1917.
Robert Bowie Owens Robert "Bobby" Bowie Owens (October 29, 1870 – November 3, 1940) was a U.S. electrical engineer. He was the director of the Maryland Academy of Science. He was secretary of Franklin Institute from 1910 to 1924. He is credited as a discoverer of the alpha ray.