Question

Rays of light are entering from glass to glycerine. If refractive indexes of glass and glycerine are respectively 1.5 and 1.47, find the refractive index of glycerine with respect to glass.

• A. 0.03
• B. 1.02
• C. 2.2
• D. 0.98

Answer 1

Answer: (D)

0.98

Absolute refractive index of glass $n_1=1.5$
Absolute refractive index of glycerine $n_2=1.47$
R.I. of glass relative index $n_2=?$
$n_{21}\frac{n_2}{n_1}=\frac{1.47}{1.5}=0.98$
R.I. of glass relative to glycerine is 0.98