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Can anyone explain why these two arrangements are not equivalent? They seem to both cause same phase shift and reflections, but the first one causes the photon to pass to the right, and the second - to split.



Reflection changes "left-right". So effectively, a sugar solution (rotating polarization) before mirror rotates it in the opposite direction (vs a sugar solution after a mirror).

Actually it is a tricky thing I realised while testing this game. I thought it was an error in code. But nope - it was how does physics work. :)

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