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What is a laser?
Answer
Laser is an acronym that stands for Light Amplification by Stimulated Emission of Radiation. A laser is a device that emits light (electromagnetic radiation) through a process called stimulated emission. Laser light is usually spatially coherent, which means that the light either is emitted in a narrow, low-divergence beam, or can be converted into one with the help of optical components such as lenses.
