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单词 Huygens, Christiaan (1629–95)
释义
Huygens, Christiaan (1629–95)

Physics
  • who worked at the Academy of Science in Paris from 1666 to 1681. Returning to The Hague, his birthplace, in 1657, he designed the first pendulum clock and made improvements to astronomical telescopes (with which he discovered Saturn’s satellite Titan in 1655). In addition, Huygens was one of the first people to appreciate the importance of conservation laws in physics. His greatest achievement was the wave theory of light, announced in 1690 in his Treatise on Light (see Huygens’ construction).


Mathematics
  • In mathematics, he is remembered for his work on pendulum clocks and his contributions in the field of dynamics. These concerned, for example, the period of oscillation of a simple pendulum and matters such as the centrifugal force in uniform circular motion.


Astronomy
  • In 1655 he discovered Titan, the largest satellite of Saturn. Soon after, he announced that the planet was surrounded by a ‘thin flat ring’; others had observed the rings, but misinterpreted what they saw. In 1659 he discovered dark markings on Mars, notably the wedge-shaped Syrtis Major. With his brother, Constantijn Huygens (1628–97), he constructed aerial telescopes (tubeless telescopes supported by cables) of very long focal length to overcome aberrations. He invented the Huygenian eyepiece. To physics he contributed the principle of conservation of momentum (1656) and the wave theory of light (1678). He also made the first pendulum clock (1657).


Statistics
  • The son of a diplomat, Huygens studied law and mathematics, first at U Leiden and then at the College of Orange at Breda. His principal interest was astronomy, but this required precision instrumentation and led to his devising new methods for polishing lenses and keeping accurate time—in 1656 he patented the first pendulum clock. The previous year he had discovered the first of Saturn's moons. In 1657 he wrote the first printed work on probability, De Ratiociniis in Ludo Aleae (Calculation in Games of Chance).

    http://www.maths.tcd.ie/pub/HistMath/People/Huygens/RouseBall/RB_Huygens.html Fuller biography.


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