# Pendulum waves

**URL:** <https://boards.straightdope.com/t/pendulum-waves/603795>\
**Category:** Miscellaneous and Personal Stuff I Must Share\
**Created:** [November 22, 2011, 8:59pm UTC](https://boards.straightdope.com/t/pendulum-waves/603795 "2011-11-22T20:59:47Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Bumbershoot](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/bumbershoot/32/3428_2.png) [@Bumbershoot](https://boards.straightdope.com/u/Bumbershoot)\
**Post date:** [November 22, 2011, 8:59pm UTC](https://boards.straightdope.com/t/pendulum-waves/603795/1 "2011-11-22T20:59:47Z")

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"Harvard students built a device with a series of 15 pendulums in a row, each one slightly longer than its neighbor, then set them in motion and filmed the result.

The resulting patterns in this short video are quite fascinating to watch."

[Video here](http://sciencedemonstrations.fas.harvard.edu/icb/icb.do?keyword=k16940&pageid=icb.page80863&pageContentId=icb.pagecontent341734&state=maximize&view=view.do&viewParam_name=indepth.html#a_icb_pagecontent341734).

Pretty cool! Sometimes it looks like 5 pendulums with three balls each.

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**Author:** ![tdn](https://avatars.discourse-cdn.com/v4/letter/t/94ad74/32.png) [@tdn](https://boards.straightdope.com/u/tdn)\
**Post date:** [November 22, 2011, 9:03pm UTC](https://boards.straightdope.com/t/pendulum-waves/603795/2 "2011-11-22T21:03:36Z")

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I want one.

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**Author:** ![GaryM](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/garym/32/241_2.png) [@GaryM](https://boards.straightdope.com/u/GaryM)\
**Post date:** [November 23, 2011, 1:24pm UTC](https://boards.straightdope.com/t/pendulum-waves/603795/3 "2011-11-23T13:24:58Z")

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Very nice.