Light and Color

Soap Film Painting

Visitors pull a long bar out of a soap solution reservoir along guide wires, creating a large soap film 5 feet square. Beautiful interference colors are observed as the film flows and thins out, eventually becoming black due to destructive interference. Blowing on the bubble sheet can set up interesting flow patterns or distort the film into interesting reflective shapes. Shaking the frame of the exhibit can excite various resonant standing waves. This exhibit also demonstrates nonlinear behavoir through its cascading fractal patterns of color.