Refraction theory

Refraction is the bending of light when it passes from one medium to another, like air to water. This bending occurs because light travels at different speeds in different materials. For instance, when you see a straw in a glass of water, it appears bent at the surface due to refraction. This change in direction can cause visual illusions, like seeing objects in a different position than they really are. Refraction is fundamental in various applications, such as eyeglasses and cameras, as it helps focus light to create clear images.