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  4. The refractive index of water with respect to air is 4/3 and the refractive index of glass with respect to air is 3/2. The refractive index of water with respect to glass is:

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Q. The refractive index of water with respect to air is 4/3 and the refractive index of glass with respect to air is 3/2. The refractive index of water with respect to glass is:

JIPMERJIPMER 2000

Solution:

Using the formula for refractive index $ {}_{w}{{\mu }_{g}}=\frac{{}_{w}{{\mu }_{a}}}{{}_{g}{{\mu }_{a}}}=\frac{4/3}{3/2}=\frac{8}{9} $