▶ Refraction Definitions :
The bending of light from its straight line path when it travels from one medium to another.
▶Definition: The change in direction of a ray of light when it passes through one media to another with differing optical densities.
▶Definition: A change in the direction of travel of light, sound, or other waves crossing a boundary
▶ Definition: change in direction of light ray when passing one medium to another.