Question

In the given figure what shall you observe on twisting the string
and twirling the card rapidly? Give an explanation for
your observation​

Answer 1

Explanation:

While twisting the string and twirling the card rapidly we observe that the parrot is inside the cage.

This happens because when we see an object its image is formed on the retina and it remains for 1/16 of a second.

While we twist the string rapidly the image of the parrot or the cage remaims on our retina for 1/16 second.

Therefore, the parrot appears to be inside the cage when we twist the string rapidly.