Objective:
To demonstrate how white light can be separated into a color spectrum
Materials:
- Bubble solution (two-thirds cup Joy® dishwashing soap, one gallon of water, and two tablespoons of glycerin)*
- Bowl (any size)
- Flashlight
- Pipe cleaner
- Tape
- White paper (24” x 36”)
*This makes more bubbles than needed for this experiment.
Procedure:
Bend the pipe cleaner at the top to form a loop. (It should look like a bubble blower.) Fill the bowl with the bubble solution. Holding the pipe cleaner at the bottom, dip the loop into the bubble solution. After a minute or two, remove the loop from the bubble solution. Do you see any colors? Now, tape the sheet of white paper on the wall. Dim the lights in the room. Place the flashlight so the loop shadow is cast on the paper.
Conclusion:
As the white light passes through the bubble solution, it breaks apart into its color spectrum. The light waves continue to produce a colored shadow on the white paper.
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