Monday, November 11, 2019

optics - Does Fermat's principle of least time apply to sound waves?


I am reading Feynman's presentation of Fermat's Principle of Least Time, which explains the behavior of light; does it apply to waves in general? for example sound waves or waves on the surface of water?


In particular does Feynman's method of summing probability amplitudes apply to sound waves? (naturally we would have to talk about amplitude of disturbance rather than amplitude of probability)


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