Sometimes, two or more waves join together. Interference is the addition, or coming together, of several waves. Constructive Interference happens when two or more waves come together to form a larger and stronger wave, matching their crests and troughs . Destructive Interference is when two or more waves come together and cancel each other out to make a weaker wave. This interference is like that seen with water waves.
White light is made up of many colors.
These different colors have different wavelengths. The separation of white light into many colors on a bubble happens because of interference. Keep paper towels handy. A sink is handy. Soap solution may cause irritation if it gets into eyes.