Using Light: Light Interactions

The video tutorial explains how the shape of a pencil appears to change when submerged in water due to the refraction of light. Refraction is the bending of light as it passes from one medium to another, such as from air to water. This bending causes objects to appear bent or larger underwater.

Describe the relationship between the speed of light and its bending when it strikes a surface at an angle.

What effect does refraction have on objects underwater?