Here's a breakdown:

1. Light travels in waves. These waves change speed when they move from one medium to another. For example, light travels slower in water than in air.

2. When a wave of light hits a boundary between two mediums, it changes direction. This change in direction is called refraction.

3. The angle of refraction depends on the angle of incidence and the difference in the speeds of light in the two mediums. The greater the difference in speed, the greater the angle of refraction.

Here's a simple analogy: Imagine a car driving from a smooth road onto a patch of mud. The car will slow down as it hits the mud, and it will also change direction. The angle of the change in direction will depend on how much the car slows down and the angle at which it hits the mud.

Refraction is responsible for many everyday phenomena, such as:

* The bending of a straw in a glass of water. The light from the straw travels through the water and then into the air. The change in speed causes the light to bend, making the straw appear to be bent.

* The formation of a rainbow. When sunlight passes through raindrops, it is refracted and reflected, separating the light into its different colors.

* The way lenses focus light. Lenses are designed to refract light in a specific way, allowing them to focus light onto a specific point.

Overall, refraction is a fascinating phenomenon that plays a vital role in our understanding of how light interacts with the world around us.