An important property of light is interference. Although the wavelike properties of light are not immediately obvious, the effects of interference can be seen in the coloration of soap bubbles.
Light is able to reflect off of both the outside of the bubble as well as the inside of the bubble shell. The result is that two rays light of identical wavelength that travel in the same direction are now offset in phase. When completely out of phase, destructively interference eliminates that wavelength from our vision. In this laboratory, we create large bubble wands and study the apparent physical properties of soap bubbles, especially their coloration.