Why does refraction of light occur? Refraction of light is a phenomenon where the direction of light is changed when it crosses the boundary between two materials of different optical densities. Water in a deep pool appears less deep than it really is. It is the effects of refraction of light.
There are two laws of refraction. The incident ray and the refracted ray are on the opposite sides of the normal at the point of incidence, and all three lie in the same plane. The value of (sin i/sin r) is a constant. It's a Snell Law formula. In condition, a ray of light travels from one medium to another.
For example, Diagram above shows a light ray directed into a glass block. Which is the angle of refraction?
The answer is B. The angle of refraction is the angle between the refracted ray and the normal.
When a ray of light passing through prism, refraction of light occurs. A ray of white light is seperated into 7 different colours. The same thing happens inside the rain drop which creates a rainbow.