The refractive index of ice is 1.31 and that of rock salt is 1.54. Calculate the refractive index of rock salt with respect to the refractive index of ice.

Given,

Refractive index of ice = 1.31

Refractive index of rock salt = 1.54

We know,

Refractive index = $\frac{Speedoflightinvacuum}{Speedoflightinthemedium}$

Refractive index of rock salt with respect to ice =$\frac{refractiveindexofrocksalt}{refractiveindexofice}$

Refractive index of rock salt with respect to ice =$\frac{1.54}{1.31}$ =1.175

Hence, the Refractive index of rock salt with respect to ice is 1.175