As far as I know, all LCDs operate on polarized light. I’ve generally assumed that Apple puts a quarter-wave plate in front of their screen to circularly polari

As far as I know, all LCDs operate on polarized light. I’ve generally assumed that Apple puts a quarter-wave plate in front of their screen to circularly polarize the light. Without having done any math, I would expect a noticeable amount of color shifting when viewed through a linear polarizer because most waveplates are wavelength-dependent (they shift the optical path by a certain distance, which is a different amount of phase at different wavelengths). I’ve never found credible information online, but I haven’t looked that hard.