On November 8, 1895, when he was the president of the University of Würzburg in Germany, he observed a faint light placed near the ray tube while conducting cathode ray experiments, and finally he was convinced that it was a new ray. Someone proposed to name the new rays he discovered as "Roentgen rays", but Roentgen insisted on using the name "X-rays", and the machine that produces X-rays is called an X-ray machine.In 1901, the first Nobel Prize was awarded, Roentgen won the Nobel Prize in Physics.