I've been reading Feynman's "QED: The Strange Theory of Light and Matter" and was wondering how exactly does QED treat a photon. In the book, Feynman always asserts that photons are particles and not waves because the wave theory of light can't explain the individual clicks of a photo-multiplier when its hit with low energy light. But if the wave theory is wrong because it doesn't explain the photo-multiplier clicks, then QED could also be wrong because it does not 'explain' partial reflection, it only models it using probabilities and ignores thew underlying mechanism.
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