Glass has refractive index u with respect to air and the critical angle for a ray of light going from glass to air is θ. If a ray of light is incident from air on the glasses with the angle of incidence θ, the corresponding angle of refraction is
A ray of light traveling in air falls on the surface of water. The angle of incidence is 600 with the normal to the surface. The refractive index of water = 43. Calculate the angle of refraction. [2 MARKS]