Christiaan Huygens


Dutch Protestant mathematician, astronomer, physicist, horologist, and writer of early science fiction.

Sometimes said to have invented the "lantern of fright" or magic lantern: a box with lenses for projecting images painted on glass, including he first moving slide, showing a skeleton performing various movements, based on Hans Hlbein's 16th century book of engravings, Dance of Death.

Huygens' work included early telescopic studies elucidating the nature of the rings of Saturn and the discovery of its moon Titan, the invention of the pendulum clock and other investigations in timekeeping, and studies of both optics and the centrifugal force.
Huygens achieved note for his argument that light consists of waves, now known as the Huygens–Fresnel principle, which became instrumental in the understanding of wave-particle duality. He generally receives credit for his discovery of the centrifugal force, the laws for collision of bodies, for his role in the development of modern calculus and his original observations on sound perception. Huygens is seen as the first theoretical physicist as he was the first to use formulae in physics.

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