Bubble Colors Bubble Colors C olor, one of the most beautiful aspects of bubbles, also provides us with an extremely accurate tool for measuring the thickness of the soap film.
Red light has the longest wavelength and violet the shortest.
This combination of equal ups and downs causes complete cancellation or interference. Interference is responsible for the pearly luster of an abalone shell, the beautiful colors in some bird feathers and insect wings, and the flowing patches of color in an oil slick on the street after a rain shower - and for the color of bubbles. W hite light is made up of all colors, all wavelengths. For example, if blue light is subtracted from white light, we see yellow. The skin of a bubble glistens with the complementary colors produced by interference.