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Return to Terminology
X
- X-Ray
- Electromagnetic radiation of very short wavelength, lying
within the wavelength interval of 0.0 to 100 angstroms (between gamma rays and
ultra-violate radiation). Also called "X-radiation", "Roentgen ray."
(X-rays penetrate various thicknesses of all solids and they act upon photographic plates
in the same manner as light. Secondary X-rays are produced whenever X-rays are absorbed by
a substance; in the case of absorption by a gas, this results in ionization.)
- Xenon
- (Xe), gaseous element, discovered spectroscopically in 1898 by
William Ramsay and M.W. Travers. It is a rare, colorless, odorless, tasteless Inert Gas used in certain photographic-flash lamps, in
high-intensity arc lamps for motion-picture projection, in high-pressure arc lamps to
produce ultraviolet light, and in numerous radiation-detection instruments.
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