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Nature 432, 153 (11 November 2004) | doi:10.1038/432153a; Published online 10 November 2004

Turning points Making waves

Charles H. Townes1

  1. Charles H. Townes is in the Department of Physics, University of California, Berkeley, California 94720, USA.
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How a stroll in the park led to the beginning of quantum electronics.

Immediately after the Second World War, physicists in several laboratories began working on the microwave spectroscopy of molecules. The field grew rapidly, but was soon given up by industrial labs — they saw no useful applications for the work — and moved to universities.

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