Cylindrical Lens Puzzle: a favorite classroom challenge problem- this cylinder of acrylic acts as lens that focuses light along a line rather than a point, and hence it can invert an image along its symmetry axis. Puzzle question: the word “GREEN” is flipped by this lens but the word “TOMATO” seems unaffected. Is the physics significantly different for red wavelengths as compare to green? Or is there another explanation/trick? Answer below. ➡️ Follow the link in my profile for info on where to b
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