Question

The ray if light are entering from glass into glycerine . If the absolute refractive indices of glass and glycerine are 1.5 and 1.47 respectively, find the refraction index of glycerine related of glass

Page 46 Chapter - 2.Reflection and Refraction

Answer 1

When the refractive index of medium compared to other medium, We call it as relative refractive index.

$_{1}n _{2} = \dfrac{n_{2} }{n _{1}}$

In other words, Refractive index of medium 2 relative to medium 1 can be given as, ratio of refractive index of medium 2 to medium 1.

Given, The ray if light are entering from glass into glycerine . If the absolute refractive indices of glass and glycerine are 1.5 and 1.47 respectively

$n_{glycerine} = 1. 47 \\ n_{glass} = 1. 5$

Now,

Refractive index of glycerine relative to glass

$= \dfrac {n_{glycerine} }{n_{glass} } \\ \\ = \frac{1.47}{1.5} \\ \\ = 0.98$

Therefore, Refractive index of glycerine related to glass is 0.98.