Laser
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laser: Acronym for light?Create amplification by [stimulated emission]?Create of radiation . A device that produces a coherent beam of optical radiation by stimulating electronic, ionic, or molecular transitions to higher energy levels so that when they return to lower energy levels they emit energy. Note 1: Laser radiation may be either temporally coherent, spatially coherent, or both. Note 2: The [degree of coherence]?Create of laser radiation exceeds 0.88. (188)
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