Refraction is the change of direction of a wave such as light due to change of its what when passing from one medium to another?
Refraction Refraction In physics refraction is the change in direction of a wave passing from one medium to another or from a gradual change in the medium. Refraction of light is the most commonly observed phenomenon, but other waves such as sound waves and water waves also experience refraction. How much a wave is refracted is determined by the change in wave speed and the initial direction of wave propagation relative to the direction of change in speed. For light, refraction follows Snell's law, which states that, for a given pair of media, the ratio of the sines of the angle
Reflection phase change Reflection phase change A phase change sometimes occurs when a wave is reflected. Such reflections occur for many types of wave, including light waves, sound waves, and waves on strings. Light waves change phase by 180° when they reflect from the surface of a medium with higher refractive index than that of the medium in which they are travelling. A light wave travelling in air that is reflected by a glass barrier will undergo a 180° phase change, while light travelling in glass "will not" undergo a phase change if it is reflected by a boundary with air. For this