Question

24. The refractive index of glass is 1.50 and that for alcohol is 1.25 with respect to air What is the refractive index of the glass with respect to alcohol? (a) 0.82 (b) 1.29 (c) 111 (d) 1.2​

Answer 1

Given:

Refractive-index of the glass to air (A1)      = 1.5

Refractive-index of the alcohol to air (A2) = 1.25

To Find:

Refractive-index of glass to alcohol = ?

Solutions:

In optics, Index of refraction(Refractive-index) of material is a dimensionless quantity that tells how fast light can go through material.

Increasing the refractive-index corresponds to the decreasing speed of light in material.

Refractive- index of the glass to alcohol = 1.5 / 1.25

                                                              =  1.2

So correct answer of this question is option (d)