AP EAMCET Medical 2018 Shift 1 Paper

Interference fringes were produced in Young’s double slit experiment using light of wavelength 6000

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. When a transparent film of thickness 3 x 10“3 cm was placed over one of the slits, the hinge pattern is shifted by a distance equal to 20 hinge widths. The refractive index of the material of the film is