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Optics Appendix: What's Behind the Curtain?

Previous chapters have covered mirrors and lenses. In this appendix, mirrors and lenses are considered by asking questions regarding the optical element(s) present in the animation. The optical elements are all unknown since they are hidden behind red curtains. You are given a type of source (object, beam, point) and must analyze the resulting light rays to determine what's behind the curtain.

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