Толковый словарь английского языка - laser
Laser
laser
noun Usage: often attributive Etymology: light amplification by stimulated emission of radiation Date: 1957 a device that utilizes the natural oscillations of atoms or molecules between energy levels for generating a beam of coherent electromagnetic radiation usually in the ultraviolet, visible, or infrared regions of the spectrum, something resembling a ~ beam in accuracy, speed, or intensity
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1.
n. a device that generates an intense beam of coherent monochromatic radiation in the infrared, visible, or ultraviolet region of the electromagnetic spectrum, by stimulated emission of photons from an excited source. Etymology: light amplification by stimulated emission of radiation: cf. MASER ...Толковый словарь английского языка Oxford English Reference
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