The bending of a wave's direction is called refraction.

Here's a breakdown:

* Refraction occurs when a wave passes from one medium to another, causing a change in its speed and direction. This happens because the wave's speed is different in the two mediums.

* Example: Light refracts when it passes from air to water, causing the straw in your glass of water to appear bent.

Let me know if you'd like to learn more about refraction!