Laser, the device that emits light through a process of optical amplification based on the stimulated emission of electromagnetic radiation, has many important applications in technology, medicine, as well as scientific research.
The term “laser” originated as an acronym for ‘Light Amplification by Stimulated Emission of Radiation’.
In modern usage “light” broadly denotes electromagnetic radiation of any frequency, not only visible light, hence infrared laser, ultraviolet laser, X-ray laser, and so on.
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