State whether it is true or not:

When a ray of light goes from air into a clear material, you see the ray bend. How much the ray bends is determined by the Refractive index of the material.

If the refractive index for light going from air to diamond be 2.42, what will be the refractive index for light going from diamond to air?

How is the refractive index of a material related to the speed of light in it?

Give three examples of materials that refract light rays. What happens to the speed of light rays when they enter these materials?

Define Snell's law of refraction. A ray of light is incident on a glass slab at an angle of incidence of 60°. If the angle of refraction be 32.7°, calculate the refractive index of glass. (Given: sin 60° = 0.866 and sin 30° = 0.5).