Get Wet // Kendall Shepherd
Soap film experiences thin film interference and creates a gorgeous rainbow.
Thin film interference is when the light waves reflected by the upper and lower bounds of a very thin film (the soap in this case) interfere with one another which can either enhance or reduce reflected light. Since the soap film has a non-uniform thickness (due to gravity and the weight of the soap pulling down on itself), we see a gradient of color.
