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MHT CET Physics question

PhysicsWave OpticsMHT CET

A parallel monochromatic beam of light is incident normally on a narrow slit. A diffraction pattern is formed on a screen placed perpendicular to the direction of incident beam. At the first maximum of the diffraction pattern, the phase difference between the rays coming from the edges of the slit is [MHT-CET 2020]

Answer: (C)

Solution

At the first secondary maximum , so the phase difference is

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Question ID VK-077555