Which one of the following statements is correct regarding the travel of a light beam from a rare to a dense medium?
1
A light beam travelling from a rare medium to a dense medium slows down and bends towards the normal.
2
A light beam travelling from a rare medium to a dense medium speeds up and bends towards the normal.
3
A light beam travelling from a rare medium to a dense medium slows down and bends away from the normal.
4
A light beam travelling from a rare medium to a dense medium speeds up and bends away from the normal.