If the light rays are travelling from one medium to another they change their direction at the boundary between two mediums. When the light rays either bend or change their direction while passing ...

The first law of refraction states that the incident rays, refracted rays, and the normal to the interface at the point of incidence, all lie in the same plane. The ratio of the sine of the angle of ...

When light travels from air into glass it slows down because glass is more (optically) dense than air. This change in speed can cause the light to bend at the boundary between the two transparent ...