1. Take a burning incense stick in your hand and rotate it fast along a circle. What do you see and why?
→ A complete circle of red light is seen.
This happens due to the persistence of vision.
2 Marks
2. Draw a cage on one side of a cardboard and a bird on the other side. Hang the cardboard with the help of a thread. Twist the thread and leave it. What do you see and why?
→ The bird appears to be inside the cage.
This happens due to the persistence of vision.
2 Marks

Watch Video (5:32):

A YouTube video explaining the persistence of vision:

This page was last modified on
02 March 2020 at 03:45