For Problems 10 12 A point source Semits light of wavelength 600 nm It is...

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For Problems 10 12 A point source Semits light of wavelength 600 nm It is placed at a very small distance from a flat reflecting mirror AB Interface fringes as observed on the screen placed parallel to reflecting surface at very large distance D from it The ratio of minimum to maximum intensities in the interference fringes formed near the point P is 1 6 A B a elliptical c circular S D Po Screen 10 What is the shape of interference fringes on the screen b paraboloid d none of these 11 What is the percentage intensity of the reflected light to the intensity of the reflected light to the intensity of incident light a 49 b 64 c 81 d 36 12 If the intensity of P corresponds to a maximum calculate the minimum distance through which the reflecting surface AR should be shifted so that intensity at P again becomes

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