JEE Advanced Model Paper 8 with solutions for online practice

Light of wavelength 500nm falls on two narrow slits placed at a distance d = 0.05 mm apart at angle ϕ = 30° relative to the slits shown in figure. On the lower slit a transparent slab of thickness 0.1mmand refractive index 1.5 is placed. The interference pattern is observed on a screen at a distance D = 2m from the slits.