Physics - Wave Optics Question with Solution | TestHub

One slit of a double-slit experiment is covered by a thin glass plate with a refractive index of 1.4, and the other by a thin glass plate with a refractive index of 1.7. The point on the screen where the central bright fringe was formed before the introduction of the glass sheets is now occupied by the 5ᵗʰ bright fringe. Assuming that both glass plates have the same thickness and the wavelength of light used is $4800\mathring{A}$, find their thickness(in μm).