Ask students for their hypothesis as to why the light reflected from under the water produced different colors. Students may think that the colors come from the water and not from the light itself. You may want to explain that white light contains all the colors of the rainbow. Some of the colors are bent more than others. When the colors of light leave the water, they go in slightly different directions, thereby separating the colors.
Students are to follow the directions and record their observations.
Use brightly colored paint or markers to color the 6 sections of your color wheel . Make two small holes near the center of the circle, about two centimeters apart. Pass a 50 centimeter piece of cord through the two holes. Tie the two ends of the cord together. Hold the cord by the loops in each end and ask a friend to slide the circle along until it is midway between your hands.