Refraction is the bending of a wave caused by a change in its speed as it moves from one medium to another.
This occurs because of the slow speed of light in dense materials.
Examples of phenomena caused by refraction
- When you place a bar in a cup with water, the bar looks bent.
- If you dip your feet in the water, it looks shorter than the original.
- The fish looks smaller when you take it out of the water.