Name the phenomenon due to which a swimming pool appears less deep than it really is.

A ray of light goes from water into air. Will it bend towards the normal or away from the normal?

State two effects caused by the refraction of light.

When a ray of light passes from air into glass, is the angle of refraction greater than or less than the angle of incidence?

A ray of light passes from air into a block of glass. Does it bend towards the normal or away from it?