X-rays were first discovered in 1895, by a German physicist Wilhelm Conrad Roentgen (1845-1923). However the German physicist did not understand what they were- hence that is how X-rays got their name. In the terms of mathematics and science, the term “X” refers to an unknown. By the end of the of the 1890’s, hospitals had started to use X-rays in taking radio graphs of bones, internal organs and tissues to help diagnose injuries and illnesses. Using the new X-ray technology, doctors could now virtually “see” the insides of a human body. Roentgen received the first Nobel Prize for physics, in 1901, for his discovery of the short-wave ray.