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Oil film rainbow colors

Oil film rainbow colors
When you see rainbow patterns in an oil slick on water or wet pavement, you're witnessing light interference. The oil film is incredibly thin, often just a few hundred nanometers thick. Light waves bounce off both the top and bottom surfaces of the oil layer, and when these waves recombine, different colors cancel out or amplify based on the film's thickness. This is the same physics that creates colors in soap bubbles.
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