refraction

Refraction is when light bends when it goes from one material to another. This happens because light travels at different speeds in different materials. When light hits the boundary between two materials, it slows down or speeds up depending on the material it is entering. This change in speed causes the light to bend.

We can see refraction happening in many everyday things. For example, when we look at a straw in a glass of water, the straw looks bent. This is because the light from the straw is refracted when it goes from the air into the water.

Refraction is also used in many optical devices, such as lenses and prisms. Lenses are used to focus light, and prisms are used to split light into its component colours.

The refraction of light by the water caused the fish to appear to be in a different location.