Question

To find the refractive indices of (a) water (b) oil (transparent) using a plane mirror, an equi convex lens (made from a glass of known refractive index) and an adjustable object needle

Answer 1

REFRACTIVE INDEX

The comparison of the speed of light or spectrum in one medium and the other is refered to as refractive index

Different medium have different refractive index ,water ,oil ,gas ,spirit etc .rafractive index is therefore in ration form

The refractive index of water in 1.330 while that of oil is 1.36..to find a refractive index ,find the inverse of the sin of incident ray