Lasers are devices that produce intense beams of monochromatic, coherent radiation. The original term "laser" (dating to about 1960) was an acronym for "light amplification by stimulated emission of radiation", although its original meaning has generally been overshadowed by regular use of the lowercase term. This original acronym, however, provides an excellent description of a laser.
Lasers are essentially specialized light sources which emit a narrow...
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