Question

If the absolute refractive indices of glass and water are 3/2and 4/3 respectively , what is the refractive index of glass with respect to water?

Answer 1

Answer.

Actually, ng = 3/2 and nw= 4/3.

Absolute Refractive Index of a medium = Speed of light in vacuum/Speed of light in the medium

Speed of light in glass = 2 x 108 m/s
Speed of Light in Vacuum = (3/2) x 2 x 108 m/s = 3 x 108 m/s

Speed of light in water = (3 x 108 m/s)/(4/3)
                                        = 2.25 x 108 m/s