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A Favorite Abode of Science:

Santa Clara College and the Pursuit of Scientific Knowledge, 1851-1900

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Lissajous figures
Lissajous figures
Two oscillations one along the x axis and the other along the y axis when added result in a two dimensional motion. The path traced is known as Lissajous figures. The optical production of the curves was first demonstrated in 1857 by Jules Antoine Lissajous (1833-1880). The combination of periodic waves moving back and forth with periodic waves moving up and down create the patterns.

Image#: Lissajous figures
From J. Lissajous, "Etude Optique des Mouvements Vibratoires," Annales de Chimie et de Physique 51 (1857).
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