The “miraculous rays” X-Rays which could look-make structures inside the body were discovered in 1895 by a German scientist Mr: Roentegen. Thereafter these rays have been used in all possible innovative ways in the medical field. Sunrays, X-Rays, Microwave, Radio waves are all electro magnetic rays in scientific terminology. The only differentiating factor between them is their energy- content. Radio and television waves do not have much energy and so though they are present all around us in innumerable numbers, they cannot harm us and we are still alive. The energy from the X-Rays is 10,000 to 15,000 times more powerful than light and therefore can penetrate through objects. An amazing fact of nature is that the human eye can perceive only the sun rays and the rest of the rays are invisible to us.
The common X-Rays only give a rough picture of the skull or a one dimensional picture, but the depth of any feature cannot be judged, e.g. if there is a tumor inside thebrain its exact location as well as the depth of the abnormality cannot be judged by X-Rays.