Question

When light ray travels from a rarer medium to
denser medium it bends .....
A)
towards normal
B)
no change in path
C)
away from normal
D)
None​

Answer 1

Explanation:

Refraction is the bending of light rays after entering a medium where its speed is different. Due to refraction of light, when a ray of light passes from a rarer medium to a denser medium, bends towards the normal to the boundary between the two media. The amount of bending depends on the indices of refraction of the two media.

Hence, when a ray of light from air enters a denser medium, it bends towards the normal.