an electromagnetic wave of high energy and very short wavelength, which is able to pass through many materials opaque to light.
Gamma rays are not particles but a form of electromagnetic radiation, like light, radio waves, and X-rays .
a photographic or digital image of the internal composition of something, especially a part of the body, produced by X-rays being passed through it and being absorbed to different degrees by different materials.
Often used to identify fractures or tumors that may not be visible on an X-ray .
a code word representing the letter X, used in radio communication.