The results show that light travels slower in water, confirming the index of refraction for light transitioning from air to water is approximately 4/3. Keywords speed of light, air, water ...

Refraction is the change in direction of a wave as it travels from one medium to another. For instance, when light travels from air to glass or water waves travel from deep to shallow water.

the greater the refraction. Light is bent more by glass than by water because glass is denser than water and so slows it down more. If light is incident along the normal when it passes from air ...