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

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

The ray of light as it enters will

A monochromatic ray of light is incident normally on one of the refracting surfaces of a prism . The emergent ray grazes the second refracting surface . What is the angle of the prism if the refractive index of the material of the prism is 1.6 ?

A monochromatic ray of light is incident normally on one of the refracting surfaces of a prism . The emergent ray grazes the second refracting surface . What is the angle of the prism if the refractive index of the material of the prism is 1.6 ?

When the angle of incidence on a material is 60^(@) , the reflected light is completely polarized. The velocity of the refracted ray inside the material is (in ms^(-1) )