3D30.50 - Ruben's/Flame Tube


Ruben's/Flame Tube Demo
Ruben's/Flame Tube Demo



Code: 3D30.50


Demo Title: Ruben's/Flame Tube


Subject: Resonance Cavities


Description:
A length of pipe is perforated along the top and sealed at both ends - one seal is attached to a small speaker or frequency generator, the other to a supply of a flammable gas (propane tank). The pipe is filled with the gas, and the gas leaking from the holes is lit. If a constant frequency is used, a standing wave can form with the flames.


Procedure:

  • Ask audience (how big is sound?)
  • Explain sound waves have different sizes.
  • Ignite the tube on top.
  • Adjust the volume of the tone and show how the flames will change heights in the wave form.
  • Change the sound to higher pitch giving a different wave length.
  • Play a song through and show how all the different tones effect the waves in the tube.

  • Video URL:


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