When people who are interested in optics look at a bubble, they frequently see a beautiful example of colors produced by the interference of light. It is not difficult, at the level of a general physics course, to calculate the path difference between light rays reflected from the two surfaces of a soap film, and for a given thickness of film determine which reflected wavelengths are enhanced by constructive interference and which are diminished by destructive interference.
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Publish Date: 01 October 1993
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