What is Refraction?

Refraction is the bending of light as it passes from one medium to another, such as air to water or vice versa. This phenomena occurs due to the change in speed of light as it moves from one medium to another. The amount of bending depends on the angle at which the light enters and the change in speed. Refraction is responsible for optical illusions, the way lenses work, and the way rainbows are formed. Understanding refraction is essential in comprehending how light behaves and how it can be manipulated, making it a fundamental concept in the study of physics and light.