Question

Refractive index of glass with respect to water is 1.125. If the absolute refractive index of glass is 1.5, find the absolute refractive index of water.

• A. 1.5
• B. 1.33
• C. 1.7
• D. 1.9

Answer 1

The correct option is B 1.33

Here, the refractive index of glass with respect to water i.e.,
${}_w{\mu }_g=1.125$
and absolute refractive index of glass
${\mu }_g=1.5$

We know that

${}_w{\mu }_g=\frac{{}_a{\mu }_g}{{}_w{\mu }_g}=\frac{1.5}{1.125}=1.33$