Who discovered X-rays and when were they discovered?

X-rays were discovered by the German physicist Wilhelm Conrad Röntgen on November 8, 1895.12

While experimenting with cathode-ray tubes, Röntgen observed that a fluorescent screen located away from the apparatus began to glow, even when shielded from visible light. He deduced that an unknown form of radiation was being emitted from the point where the electron beam struck the glass wall of the tube. Röntgen demonstrated that this radiation could pass through materials opaque to visible light, famously producing the first X-ray image of the bones in his wife's hand. His discovery revolutionized physics and diagnostic medicine, for which he was awarded the first Nobel Prize for Physics in 1901.12