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The fringe widths are found to be ω1 and ω2 respectively if a Young's double slit experiment is performed in medium of refractive index n1 and n2 respectively. The correct statement is

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Important Questions on Wave Optics

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Two coherent plane waves of identical frequency, polarization and intensity I interfere at a point where they differ in phase by 60°. What is the resulting intensity?
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Two beams of monochromatic light with intensities 64 mW and 4 mW interfere constructively to produce an intensity of 100 mW. If one of the beams is shifted by an angle θ, the intensity is reduced to 84 mW. The magnitude of θ is
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Interference fringes are obtained in a Young double slit experiment using beam of light consisting two wavelengths 500 nm and 600 nm. Bright fringes due to both wavelengths coincide at 2.5 mm from the central maximum. If the separation between the slits is 3 mm, then the distance between the screen and plane of the slits is
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In a Young's double slit experiment, a thin sheet of refractive index 1.6 is used to cover one slit while a thin sheet of refractive index 1.3 is used to cover the second slit. The thickness of both sheets are same and the wavelength of light used is 600 nm. If the central point on the screen is now occupied by what had been the 10th  bright fringe m=10, then the thickness of covering sheets is
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What would be the angular separation between the consecutive bright fringes in Young's double slit experiment with blue green light of wavelength 400 nm? The separation between the slits is 0.001 m.
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In Young's double slit experiment using monochromatic light of wavelength λ, the intensity of light at a point on the screen where the path difference is 13, is I0. What is the intensity of light at a point where the path difference is λ ?
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The fringe widths are found to be ω1 and ω2 respectively if a Young's double slit experiment is performed in medium of refractive index n1 and n2 respectively. The correct statement is