Abstract

This chapter presents a project related to optics. The project quantifies the fact that Fermat's principle implies Snell's Law. Snell's Law from optics says that light traveling from point P reflects off a mirror to point Q in such a way that the angle of incidence equals the angle of reflection. While Fermat's Principle says that light travels along the path that requires the least time. Among all paths reflected off a flat mirror, one can see geometrically that light will reflect at the point where the angle of incidence equals the angle of reflection. In other words, Fermat's Principle implies Snell's law. The chapter presents the proof of Snell's law for a flat mirror.

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