The X-rya was accidentally disocvered by the physisist Wilhelm Conrad Roentgen, while he was studying cathode rays.
The X-ray is called the x-ray because of it's unknown nature.
. The wavelength of an X-ray can get as small as 4 billionth of an inch, or even smaller.
The study of X-rays has been very impotant to theortical science. Used as a research aide, the X-ray helped physicists to verify the theory of "crystallography".
X-rays are used to test metallic castings, their importance being that they don't destroy them when they are being tested.
X-rays are used to help treat disesases, such as cancer or a tumor, by exposing them to the radiation.
The computerized axial tomography, or CAT scan, gives a clear view of any part of the body, even soft organ tissue, by using "pencil thin" x-ray beams.
The routine use of X-rays has been discouraged in the past decade by many organizations by it's "questionable usefullness" and sometimes harmful longterm side effects.