short explanation about refraction

1. REFRACTION OF LIGHT

2. As light passes from one transparent medium to another , it changes speed , and bends . OPTICAL EFFECT DUE TO REFRACTION OF LIGHT AIR WATER WATER AIR

3. The angle between the light ray and the normal as it leaves a medium is called the angle of incidence . The angle between the light ray and the normal as it enters a medium is called the angle of refraction . Air(faster) Water(slower)

6. The pencil looks bent. This is because light travels slower through water than through air. As the light enters the glass of water it slows down (changes direction) and as it leaves the glass it speeds up again – therefore making the pencil look as though it is bent!