did x ray
As a result, the term X-ray is metonymically used to refer to a radiographic image produced using this method, in addition to the method itself. Since the wavelengths of hard X-rays are similar to the size of atoms they are also useful for determining crystal structures by X-ray crystallography. X-ray microscopic analysis, which uses electromagnetic radiation in the soft X-ray band to produce images of very small objects. 2  X-ray fluorescence, a technique in which X-rays are generated within a specimen and detected.