X-ray were discovered by Wilhelm Conrad Roentgen (W.C) in 8Nov 1895. He is German physicist
Roentgen was working in his laboratory at the physical institute of the university of Wurzburge, Germany, experimenting with a type of Crooke’s tube. The tube displayed a fluorescent glow when a high voltage current was passed through it. When he shielded the tube with heavy black cardboard, he found that a greenish fluorescent light could be seen on fluorescent screen kept some 9 fit away. Roentgen concluded that a new types of ray was emitted from the tube that could pass through the black covering . The rays could pass through most substance including the soft tissue of body, but left the bones and most metals visible. One of his earliest photographic plates from his experiment was that of a film of his wife Bertha’s hand with a ring Roentgen named the invisible radiation as X-ray (unknown rays).
Roentgen received the first Nobel prize in physics in 1901 for his discovery.