hertz

Noun
  1. The unit of frequency;
    One hertz has a periodic interval of one second (named for Heinrich Rudolph Hertz) (synset 115304090)
  2. German physicist who was the first to produce electromagnetic waves artificially (1857-1894) (synset 111066929)
  3. German physicist who with James Franck proved the existence of the stationary energy states postulated by Bohr (1887-1975) (synset 111066717)

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