Answer:
When ray of light moves from air to water its speed changes and it bent away from surface.
Explanation:
When ray of light moves from less denser to more denser medium such from air to water its speed slow down and ray bent away from the surface (surface between air and water). The refraction is occur.
Refraction:
It is bending of light when it passes from one to another material.
It is measure as:
n = c / v
n = refractive index
c = speed of light in air
v = speed of light in medium
For example:
The refractive index of water is 1.33 it means light travel 1.33 times faster in vacuum as compared to water.
A ray of light passes from air to water and it bent away from the surface. The angle of refraction is less than the angle of incidence.
The bending also occur when light come from water and inter into air.
