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Contact: Sarah Yang
scyang@berkeley.edu
510-643-7741
University of California - Berkeley
Caption: Above is an illustration of how a fish in water is seen by an observer, with the red lines marking the refraction of light and the purple lines representing the path towards the perceived location of the fish, which appears above its actual location in both panels. On the left, the slightly transparent image of the fish indicates where it is perceived by the observer because of the positive refraction of light. If water exhibited negative refraction, the observer would actually see the fish swimming above the water's surface, as shown in the image on the right.
Credit: Illustration by Jason Valentine and Robert Lee
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