>
> Any single photon will go through only ONE slit. However, if you send
> MANY photons through, the probability distribution of where they
> impact behind the slit screen will have the same shape as the squared
> magnitude of the intensity of the wave function you would expect from
> diffraction.


Correct.  And if you block either slit, you get exactly the pattern you'd
get if you were "shootin' bullets" as feynman said.
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