Question

The refractive index of lens flint glass is 1.65 and for alcohol, it is 1.36 with respect to air, then the refractive index of the dens flint glass with respect to alcohol is 

A. 1.31 B. 1.21 C. 1.11 D. 1.01

Answer 1

Refractive index of air, μ_air = 1; 

Given; 

Refractive index of flint glass w.r.t air, ^airμ_glass = 1.65;

Refractive index of alcohol w.r.t air, ^airμ_alcohol = 1.36; 

Refractive index of flint glass w.r.t alcohol = alcoholμglass = ^airμ_glass / ^airμ_alcohol 

⇒ ^alcoholμ_glass = 1.213 

Hence the refractive index of flint glass w.r.t alcohol is 1.213.