The bending of waves due to a change in speed is called refraction.

Here's why:

* Refraction occurs when a wave passes from one medium to another, causing it to change direction. This change in direction is due to the change in speed of the wave as it enters the new medium.

* Examples:

* Light refracting through a prism, causing it to separate into different colors.

* Sound waves bending around a corner, allowing you to hear someone speaking from another room.

Let me know if you have any other questions!