Pendulum Waves


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 Code Number :   3B10.75 

Disclaimer:

Reprinted by permission of Dick Berg, University of Maryland, for use on this website.

The demonstrations contained and referenced herein are listed for the purposes of cataloging and describing physics demonstrations which should be conducted only under the direction of a trained instructional support professional or physicist. These demonstrations are not presented for the purpose of being conducted by persons unconnected to this Facility and/or persons not consulting with or being supervised by the recognized instructional support professional or physicist and his/her staff. The University is responsible only for those demonstrations carried out using its own equipment using established safety and scheduling policies, and bears no responsibility for those choosing to use this source material for their own purposes. All demonstrations described and contained herein are public domain, and can also be found in reference materials in libraries, bookstores, and electronic sources.

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Condition :   Excellent  
Principle :   Wave Motion  
Area of Study :  Acoustics,   
Equipment :   Multi-pendula wave demo, Aluminum angle starting bar.

Procedure :   Push the Aluminum angle starter bar against the pendulum bobs so that they are all displaced by the same amount.  Quickly remove the bar and carefully watch the wave pass through various standing and traveling wave patterns before coming back to their initial mode in which they are all in phase.  
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   References

James A. Flaten, Kevin A. Parendo, "Pendulum Waves: A Lesson in Aliasing", AJP, Vol. 69, # 7, July 2001, p. 778.



Mail Questions and Comments to:  Dale Stille