Here's a breakdown:
* Light travels at different speeds in different mediums. For example, light travels slower in water than it does in air.
* When light passes from one medium to another, it changes direction. This change in direction is called refraction.
* The amount of bending depends on the angle at which the light hits the surface and the difference in the speed of light in the two mediums.
Refraction is responsible for many everyday phenomena, such as:
* A straw appearing bent in a glass of water.
* The shimmering effect of a mirage on a hot road.
* The focusing of light by a lens in a camera or telescope.
