(Solution) - A quartz wedge with optical axis of the wedge is parallel -(2025 Original AI-Free Solution)

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A quartz wedge with refracting angle O = 3.5° is inserted between two crossed Polaroids. The optical axis of the wedge is parallel to its edge and forms an angle of 45° with the principal directions of the Polaroids. On transmission of light with wavelength ? = 550 nm through this system, an interference fringe pattern is formed. The width of each fringe is ?x = 1.0 mm. Find the difference of refractive indices of quartz for ordinary and extraordinary rays at the wavelength indicated above.