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Stimulated emission means that a light packet, a photon, coming in contact with an atom can cause an electron to descend to a lower energy level so that an additional photon with the same amount of energy is emitted. If electrons are elevated to higher energy levels with the help of heat or light, an avalanche-like effect occurs when they fall to lower levels. In the 1950s Charles Townes, Nicolay Basov, and Aleksandr Prokhorov contributed to putting this phenomenon into practical use in masers and lasers, which produce concentrated and coherent beams of microwaves and light, respectively.
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论文共 97 篇作者统计合作学者相似作者
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Steven John Lockwood, V Ravi,E H Wishnow, W Fitelson,William Mallard,Dan Werthimer,Hemma Mistry,Charles H Townes
mag(2013)
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