Question

1. Refractive index of glass with respect to water is `9/8`. Find the refractive index of water with respect to glass.
2. Name the principle used to find the value in part (a).
3. If we change the temperature of water, then will the ratio `9/8` remain the same? Write Yes or No.

Answer 1

1. Given ^wμ_g = `9/8`
   Then `""^gμ_w = 1/(""^wμ_g)`
   = `1/(9/8)`
   = `8/9`
2. The principle of reversibility of the path of light.
3. No, as the temperature rises, the medium's refractive index falls and vice versa, due to an increase in the speed of light in the medium.