Final answer:
When light moves from water to air, it speeds up and refracts, bending away from the normal due to the difference in index of refraction between the two media.
Step-by-step explanation:
When light emerges from water into air, the light ray will speed up and turn away from the normal. This phenomenon is due to the property of light called refraction. Light travels more slowly in water, which has a higher index of refraction compared to air. Upon reaching the boundary and moving into a medium with a lower index of refraction, like air, the light speeds up and bends away from an imaginary line perpendicular to the surface, known as the normal. The greater the difference in index of refraction between two media, the more pronounced the change in direction.