>>10835642The first filter turns the light so that it's polarized one way. The second one polarizes it so that it's polarized exactly 90° from the other one. The thing is, the angle also determines how much light can pass; photons with the amgle identical to the filter have the highest chance of passing through, while those perpendicular to the filter have near zero chance. The third filter is somewhere between, so that some photons from the first filter can still pass it, and it turns their polarization to its own, so they also have the chance to pass the second filter as well.
>>10835674I don't think Bells inequality is necessary for this to work. Can you explain how it's necessary here?