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qUESTIONS

What is the minimum thickness of a thin film required for constructive interference in the reflected light from it? Given, the refractive index of the film=1.5, the wavelength of the light incident on the film =600nm?

In Young’s double slit experiment, angular fringe width is 0.20^∘ for sodium light of wavelength 5890^∘ A. If the complete system is dipped in water, then the angular fringe width will be (refractive index of water =4/3).

A parallel beam of light of wavelength λ is incident normally on a narrow slit. A diffraction pattern is formed on a screen placed perpendicular to the direction of the incident beam. At the second minimum of the diffraction pattern, the phase difference between the rays coming from the two edges of slit is

A ray of light is incident normally on a glass slab of thickness 5 cm and refractive index 1.6. The time taken to travel by a ray from source to surface of slab is same as to travel through glass slab. The distance of source from the surface is

In biprism experiment, the 4 th dark band is formed opposite to one of the slits. The wavelength of light used is ( D= distance between source and screen, d= distance between the slits)

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