In a YDSE a parallel beam of light of wavelength 6000A is incident on slits...

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In a YDSE a parallel beam of light of wavelength 6000A is incident on slits at angle of incidence 30 A and B are two thin transparent films each of refractive index 1 5 Thickness of A is 20 4 m Light coming through A and B have intensities I and 41 respectively on the screen Intensity at point O which is symmetric relative to the slits is 31 The central maxima is above O i What is the maximum thickness of B to do so Assuming thickness of B to be that found in part i answer the following parts ii Find fringe width maximum intensity and minimum intensity on screen iii Distance of nearest minima from O iv Intensity at 5 cm on either side of O 30 IB 10 1mm 1m

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