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Sahay Sir > Question Answers > Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) > When entire Young’s double slit apparatus is immersed in a liquid the fringe width decreases by 20%. The refractive index of the liquid is

When entire Young’s double slit apparatus is immersed in a liquid the fringe width decreases by 20%. The refractive index of the liquid is

When entire Young's double slit apparatus is immersed in a liquid the fringe width decreases by 20^(@). The refractive index of the liquid is