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Lissajous Figures

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Lissajous figures are parametric curves where both x(t) and y(t) are sine functions. If the ratio of the frequencies is rational, the curve will always eventually close. If it is irrational, the curve will never close and eventually fill a region.

Contributed by: Stephen Wolfram (March 2011)
Open content licensed under CC BY-NC-SA

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Lissajous figures are easy to make on an oscilloscope.

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