In the diagram shown, the separation between the slit is equal to 3λ, where λ is the wavelength of the light incident on the plane of the slits. A thin film of thickness 3λ & refractive index 2 has been placed in the front of the upper slit. The distance of the central maxima on the screen from O is-

In the diagram shown, the separation between the slit is equal to 3λ,

1.	In the diagram shown, the separation between the slit is equal to 3λ, where λ is the wavelength of the light incident on the plane of the slits. A thin film of thickness 3λ & refractive index 2 has been placed in the front of the upper slit. The distance of the central maxima on the screen from O is-
Answer» In the diagram shown, the separation between the slit is equal to $3 λ$ , where $λ$ is the wavelength of the light incident on the plane of the slits. A thin film of thickness $3 λ$ & refractive index $2$ has been placed in the front of the upper slit. The distance of the central maxima on the screen from $O$ is-

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