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A flint glass and a crown glass are fitt...

A flint glass and a crown glass are fitted on the two slits of a double slit apparatus. The thickness of the strips is `0.40 mm` and the separation between the slits is `0.12 cm`. The refractive index of fint glass and crown glass are `1.62` and `1.52` respectively for the light of wavelength `480 nm` which is used in the expweiment. The interference is observed on a screen a distance one meter away. (a) What would be the fringe-width? (b) At what distance from the geometrical centre will the nearest maximum be located ?

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