Laser - Charles Hard Townes and graduate students James P. Gordon and Herbert J. Zeiger produced the first microwave amplifier
Time: 1953
Place: Columbia University, New York, U.S.
Details: In 1953, Charles Hard Townes and graduate students James P. Gordon and Herbert J. Zeiger produced the first microwave amplifier, a device operating on similar principles to the laser, but amplifying microwave radiation rather than infrared or visible radiation. Townes's maser was incapable of continuous output.
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