![]() Laser light is typically near-monochromatic, i.e., consisting of a single wavelength or color, and emitted in a narrow beam. light or other electromagnetic radiation. In analogy with optical lasers, a device which produces any particles or electromagnetic radiation in a coherent state is also called a "laser", usually with indication of type of particle as prefix (for example, atom laser.) In most cases, "laser" refers to a source of coherent photons, i.e. The back-formed verb lase means "to produce laser light" or "to apply laser light to". ![]() The term has since entered the English language as a standard word, laser, losing the capitalization in the process. A LASER (acronym for Light Amplification by Stimulated Emission of Radiation) is an optical source that emits photons in a coherent beam.
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