We had one last follow-up lesson from the Hands-on House. This lesson was about light. Today our class made “Rainbow Catchers!” They assembled the catcher, but we were not able to make a rainbow. Here is how:
Half-fill a bucket with a strong soap solution (made from dishwashing liquid and water). Add 2-3 tablespoons sugar (the sugar makes a thicker, more viscous solution). Dip the tetrahedral bubble shape into the soap solution. Draw the “rainbow catcher” out slowly and examine the colors. Notice how the colored bands change as the soap solution sinks to the bottom of the shape.