Materials Required

* A ruler * A transparent Bowl of water


  • Take a straight scale and immerse it in water.
  • See the scale now and see the difference. 

What is Learnt

When light enters water in the transparent bowl and also when it goes from the water to air it travels at different speeds. This makes the ruler look bent. This process of light is called refraction of light.


The scale looks bent in water.Light plays tricks on our eyes while going from air to water.