Contrails in the elliptical billiard

>> YOUR LINK HERE: ___ http://youtube.com/watch?v=2NLtpcyuRO8

Many viewers asked for an explanation of the video • Billiard in an ellipse - as it is not obvious that the funny wriggling worm is actually made of particles moving in straight lines, and bouncing off the boundary of the ellipse. This simulation shows the trail left by every tenth particle, each of which is highlighted in a different color. Thanks to the viewers suggesting this! • Music: Book Bag , by E's Jammy Jams‪@ethaneubanks749‬ • Current version of the C code used to make these animations: https://github.com/nilsberglund-orlea... • https://www.idpoisson.fr/berglund/sof... • For more information, see • https://images.math.cnrs.fr/Notre-uni... • https://images.math.cnrs.fr/_Berglund... • (in French, some with a Spanish translation)

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