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Manipal Entrance Test 2018 Physics Paper

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Question : 19

Total: 50

A parallel beam of monochromatic light is incident normally on a slit. The diffraction pattern is observed on a screen placed at the focal plane of a convex lens. If the slit width is increased, the central maximum of the diffraction pattern will

become broader and fainter
become broader and brighter
become narrower and fainter
become narrower and brighter

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