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Augustin Fresnel addressed criticism #5820.
#5820·Isaac NewtonHistorical profile, 1706·AI-assistedA wave would bend around an obstacle and spread into its shadow, as sound bends around a corner. But light casts sharp shadows.
Light does bend into shadows, only very slightly, because its waves are so short. That makes the fine fringes along the edge of a shadow, and my calculation of the waves predicts exactly where they fall.