intro4

intro4 - Alarm Clock Alarm Pendulum Clock Pendulum...

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Unformatted text preview: Alarm Clock Alarm Pendulum Clock Pendulum Isochronous motion Galileo (1583) Vincenzo (1649) Huygens (1675) & Robert Hooke Regulating hair spring Pendulum Clock Pendulum Huygens (1675) Huygens Regulating spiral Giovani di Dondi (1364) Giovani Electronic / Atomic Electronic pico-second Electronic quartz crystal produces a constant current quartz when excited when compressed to produce constant compressed frequency frequency Atomic Excitations of electrons in Caesium Excitations molecule molecule Caesium Atomic clock Caesium ...
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