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Patterns of [[light]] projected onto a surface by light rays reflected off or refracted through another object. These can be seen on underwater surfaces, when light passes through materials like [[water]], glass, and the like. The bright ripples you can see on the bottom of a [[pool]] or on things close to it on a sunny day are this. h4. See also * [[Refraction]] * [[Ripples]] * [[Tag group:Image composition]] h4. External links * "Wikipedia: Caustic (optics)":http://en.wikipedia.org/wiki/Caustic_%28optics%29 Updated by bot Sun, Sep 18 '22, 02:54 |