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Optical physics is a subfield of atomic, molecular, and optical physics A laser is a device that emits light through a process of optical amplification

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Lasers and Optics

Optical physics is a subfield of atomic, molecular, and optical physics. It is the study of the generation of electromagnetic radiation, the properties of that radiation, and the interaction of that radiation with matter, especially its manipulation and control.

A laser is a device that emits light through a process of optical amplification based on the stimulated emission of electromagnetic radiation. The term "laser" originated as an acronym for "light amplification by stimulated emission of radiation"

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