Question

In which direction will light bend when travelling from an optically rarer medium to an optically denser medium??

Answer 1

Light would bend towards the normal when it is travelling from a rarer medium to denser medium and it bends away from the normal when it travels from a denser medium to a rarer medium.

This phenomenon of bending of light when it travels from optically denser to rarer medium and vice versa is known as refraction.

Answer 2

The bending of light as it passes from one transparent medium to another is called refraction. It occurs because

light travels at lower speed in an optically denser medium. Light bends towards the normal at the point of incidence as it passes from an optically rarer to an optically denser medium.