Tyrrell_McAllister comments on Feynman Paths - Less Wrong

14 Post author: Eliezer_Yudkowsky 17 April 2008 06:32AM

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Comment author: Tyrrell_McAllister 06 April 2012 08:45:50PM 0 points [-]

The amplitudes don't coincide at the end. In fact some are pointing oppositely to each other and so cancel out. The final amplitude for a photon at P is the sum of the configurations coming into P. The amplitudes don't equal each other, but they can be added together to yield the amplitude for a photon at P.