Question

b. draw a diagram to show how light bends (refracts) when entering water from air.

Explanation:

Draw a horizontal line to represent the air - water interface. Draw an incident ray coming from the air at an angle to the normal (a perpendicular line to the interface). When the ray enters the water, it bends towards the normal due to the higher refractive index of water compared to air.

Answer:

A diagram with an air - water interface, an incident ray in air, a refracted ray in water bending towards the normal, and a normal line perpendicular to the interface.