How does the fringe width of interference fringes change, when the whole apparatus of Young’s experiment is kept in a liquid of refractive index 1.3?
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How does the fringe width of interference fringes change, when the whole apparatus of Young's experiment is kept in a liquid of refractive index 1.3 ? Solution : ... When the whole apparatus is placed in a liquid of refractive index 1.3, the fringe width is not effected.
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β = xD
d
When, light enters a denser medium, it's wavelength decreases by a factor 1.3 and hence, the width also decreases by a factor of 1.3
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