Refraction of Light 

Refraction of Light is a phenomenon in which there is a change in direction of ray of light when it passes from one medium to another.

O yes! It is a bit confusing, isn't it? Let me make it Simple for you-

Suppose there are two mediums, one is transparent and other is a bit denser.

Let us name the transparent medium as A and the latter one as B

Now, Picture a light ray passing from Medium A to medium B. When it enters medium B 

it will slightly get bent.

This is Refraction of Light. Such simple it is, isn't it?

Simple Visual Representation of Refraction of light-