Physics for IGCSE & O level - Rays And Waves (Section 3 - No. 46)
What happens to light as it passes from air into water (assuming a non-zero angle of incidence)?
It speeds up and bends towards the normal.
It slows down and bends towards the normal.
It speeds up and bends away from the normal.
It slows down and bends away from the normal.
Explication
Light slows and bends towards the normal when passing from air into water.