X Ray
X rays are a form of electromagnetic radiation with wavelengths that range from about 10−7 to about 10−15 meter. No sharp boundary exists between X rays and ultraviolet radiation on the longer wavelength side of this range. Similarly, on the shorter wavelength side, X rays blend into that portion of the electromagnetic spectrum called gamma rays, which have even shorter wavelengths.
X rays have wavelengths much shorter than visible light. (Wave lengths of visible light range from about 3.5 × 10−9 meter to 7.5 × 10−9 meter.) They also behave quite differently. They are invisible, are able to penetrate substantial thicknesses of matter, and can ionize matter...
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