Explanation of Reflection

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“Consider a beam of light as made up of a number of ehter waves moving forward in air and side by side, as represented by the rays A, B, C. Imagine a plane, MN, normal to these yars, attached to the waves and moving forward in a straight line. As the wave front advances beyond MN, the ray, A, strikes the reflecting surface, RS, and is turned back into the air in accordance with the law just given.” -Avery 1895


Elroy M. Avery School Physics (New York: Sheldon and Company, 1895) 330


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