Question

if a light ray falls perpendicular to the surface of a denser medium
1. it changes its direction but not speed
2. it changes speed as well as direction
3. it changes its speed but not the direction
4. it does not change direction or speed
which one is correct

​

Answer 1

Answer:

When light rays travel from air into glass or from air into water, it bends towards normal. This is because the speed of light rays decrease while travelling from air into glass or water. Case 2: When light rays travel from optically denser medium to rarer medium then they bend away from the normal.

Answer 2

Please mark me as a Brainlist answer