large bubble frames of different shapes
large bubble frames of different shapes

 

Code Number: 3B22.70

Demo Title: Standing Waves - Soap Film Oscillations

Condition: Excellent

Principle: Standing Waves

Area of Study: Oscillations & Acoustics, E & M

Equipment: 

Soap bubble solution, large bubble frames of different shapes.

Procedure:

This is one where practice makes perfect. The easiest frame to start with is probably the square one.  Rotate the wrist!!

The soap solution can be made with extra glycerin to help with longevity and film strength.  

References:

  • Tim Pritchett and Jin K. Kim, "A Low-Cost Apparatus for the Production of Surface Wave Patterns in a Vertically Oscillating Fluid", AJP, Vol. 66, #9, Sep. 1998, p. 830.
  • Arcos et al., "Vibrating Soap Films: An Analog for Quantum Chaos on Billiards", AJP, Vol. 66, #7, July, 1998, p. 601.
  • W-175, "Very Large Film - Glycerin", DICK and RAE Physics Demo Notebook.
  • Robert Ehrlich, "J.17, Standing Waves on a Soap Bubble", Turn the World Inside Out, p. 142.