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Fifteen uncoupled simple pendulums of monotonically increasing lengths dance together to produce visual traveling waves, standing waves, beating, and (seemingly) random motion.

The period of one complete cycle of the dance is 60 seconds. The length of the longest pendulum has been adjusted so that it executes 51 oscillations in this 60 second period. The length of each successive shorter pendulum is carefully adjusted so that it executes one additional oscillation in this period. Thus, the 15th pendulum (shortest) undergoes 65 oscillations.

[Thanks, Andy]

John Baichtal

John Baichtal

My interests include writing, electronics, RPGs, scifi, hackers & hackerspaces, 3D printing, building sets & toys. @johnbaichtal nerdage.net


  • http://pulse.yahoo.com/_3DJKE3F3XXTDAYMW3X4UGQMGWY Anonymous

    This one is very similar: http://youtu.be/7_AiV12XBbI

  • Anonymous

    Completely mesmerized by this, I spent a good part of yesterday building a version of this in Processing.

    Video is here: http://vimeo.com/23976651
    And source code is here: http://www.jeffreythompson.org/code/MultiplePendulumSimulation

  • http://www.facebook.com/people/Swati-Singhal/1472633195 Swati Singhal

    beautiful physics…..:-):-):-)….

  • http://www.facebook.com/people/Sreeks-Kotra/100000285401814 Sreeks Kotra

    what’s happening & how??????

  • http://www.facebook.com/vishalshinde.69 Vishal Shinde

    It is great vedio

  • http://www.facebook.com/vishalshinde.69 Vishal Shinde

    It is great vedio

  • http://www.facebook.com/Abhishek.Nischal.John Abhishek John

    Amazing…!!