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2 matches to Huygens
Clocks. 3500BC Gnomon. 2000BC Chinese. 8C BC sundial 4C BC Greek water clock. 300BC hemispherical sundial 160BC Rome. 12C mechanical. 1379 de Vick. 1657 Huygens pendulum.
Huygens, Christiaan. 1629-95. Dutch physicist, mathematician. Discovered Saturn’s rings 1655. Pendulum clock 1657. Centripetal force 1659. Conservation of Energy 1669. Wave theory of light 1678.