2. Wilhelm Roentgen, the scientist who discovered X-rays, was awarded the very first Nobel Prize in Physics in 1901. He refused to take patents out related to his discovery because he wanted humankind as a whole to benefit.

3. X-radiation or X-ray is a form of high-energy electromagnetic radiation. Other types of EM radiation that make up the electromagnetic spectrum are microwaves, infrared light, visible light, ultraviolet light, and gamma rays. They all travel in waves, but have different wavelengths.

4. The first X-ray (or roentgenogram) was of Roentgen’s wife’s hand, complete with wedding ring, in 1895. His wife was less than impressed and declared: “I have seen my death!”

5. From identifying broken bones to disease, the X-ray is one of the most useful medical advancements in history. It is also the oldest and most common form of imaging.

6. X-rays can be divided into hard X-rays and soft X-rays. Because hard X-rays have higher energy and, therefore, higher penetrative ability, they are used in medical radiography and airport security.

7. The variant spellings of X-ray in the English language include x-ray, xray, and X ray.

8. The effect of X-rays is cumulative, which means that minor doses over several years can equal a large dose at one time.

9. The term “X-ray” is used to refer to both the image itself and to the method.

10. X-rays have enough energy to ionize atoms and disrupt molecular bonds, which makes them harmful to living tissue.

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