3B22.40 - Standing Waves in a Rod

Code Number:
Demo Title:
Standing Waves in a Rod
6 foot aluminum rod, or metal yard stick.

Hold the metal yard stick on one end and shake up and down.  You should be able to show the fundamental frequency and the first overtone which will have a clear node visible at the end opposite your hand.  

You can hold the metal rod or ruler vertically from the end and give it a karate chop in the center.  You will clearly see the nodes as the rod or ruler vibrates.  

  • Lawrence W. Panek, Demonstration of the First Overtone Transverse Vibrational Mode in a Stiff Solid Bar", AJP, Vol. 48, #9, Sept. 1980, p. 786.
  • Robert Ehrlich, "J.13. Resonant Standing Waves in a Rod", Turning the World Inside Out and 174 Other Simple Physics Demonstrations, p. 138 - 139.
  • Robert Ehrlich, "J.12. Transverse Waves in a Rod", Turning the World Inside Out and 174 Other Simple Physics Demonstrations, p. 138.

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