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 were discovered by Charles Glover Barkla in 1909, who later won the Nobel Prize in Physics for his discovery in 1917. Charles Glover Barkla: Charles Glover Barkla FRS FRSE (7 June 1877 – 23 October 1944) was a British physicist, and the winner of the Nobel Prize in Physics in 1917 for his work in X-ray spectroscopy and related areas in the study of X-rays (Roentgen rays).
British