Snell's Law of Refraction

Snell's Law of Refraction describes how light bends when it passes between different materials, like from air into water. The bending occurs because light changes speed in different substances. The law states that the ratio of the sines of the angles of incidence and refraction is equal to the ratio of the materials' refractive indices. In simpler terms, it explains how much light bends based on the properties of the materials involved. This principle helps us understand phenomena like why a straw looks bent in a glass of water or how lenses focus light in glasses and cameras.