Q40 A point source Semitting light of wavelength 600 nm is placed at a very...
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Q40 A point source Semitting light of wavelength 600 nm is placed at a very small height h above a flat reflecting surface AB see figure The intensity of the reflected light is 36 of the incident intensity Interfer ence fringes are observed on a screen placed parallel to the reflecting surface at a very large distance D from it 2002 A h P S Screen B D a What is the shape of the interference fringes on the screen b Calculate the ratio of the minimum to the maxi mum intensities in the interference fringes formed near the point P shown in the figure c If the intensity at point P corresponds to a max imum calculate the minimum distance through which the reflecting surface AR should be shifted so
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