Taken by Wilhelm Roentgen in 1895, the first X-ray produced was of his wife's hand. Roentgen received the first Nobel Prize in physics for his work, but his discovery of X-ray beams also changed the medical profession far more than that simple black-and-white image might have suggested. The beams he used, higher in frequency than ultraviolet light but lower in frequency than gamma rays, revolutionized the medical profession, allowing physicians to see inside a patient's body to more readily diagnose disease and injury.