As light passes between transparent materials like air and water, it changes speed and bends at the boundary between the materials. This phenomenon is called refraction. When light travels from a faster medium like air to a slower one like water, it bends toward the normal line. To observe refraction, submerge objects like pencils or straws in a glass of water and see how they appear bent through the glass.

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)

4. You need : A glass Water A pencil or a pen or a coloured crayon or a straw,….. Do your experiment glass pencil Coloured crayon water straw

5. First, pour water in the glass. Then, submerge the object you have chosen. Finally, take a picture of your glass with the object submerged. INSTRUCTIONS

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!