A ray of green light enters a liquid from air, as shown in the figure. The angle 1 is 45° and angle 2 is 30°.

(a) Find the refractive index of liquid.

(b) Show in the diagram the path of the ray after it strikes the mirror and re-enters in air. Mark in the diagram the angles wherever necessary.

(c) Redraw the diagram if plane mirror becomes normal to the refracted ray inside the liquid. State the principle used.

The speed of light in air is 3 x 10⁸ m s^-1. Calculate the speed of light in glass. The refractive index of glass is 1.5.

The refractive index of water with respect to air is 4/3. What is the refractive index of air with respect to water?

A ray of light of wavelength 6600 Å suffers refraction from air to glass. Taking _aμ_g = 3/2, find the wavelength of light in glass.