Have you really looked at a soap bubble? Notice how you can see a bunch of different colors? These optical effects are all classified as "thin film interference." You need several physics ideas to really appreciate this optical phenomenon—let's get to it.https://trib.al/lpouGgt
Hey alright! something my students are supposed to have understood but probably forgot 
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I understood the colors; I was hoping for an explanation of the swirls, the shape of those apparent contiguous regions of a same color.
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Optical path length is constantly changing infinitesimally in different parts. Since a bubble is a liquid it’s in constant motion. This alters the interference and we end up seeing it as a moving colorful swirling pattern. Fluid dynamics may prob. explain the geometry more though
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