Question

rapid Movement of a burning incense stick appears as a complete circle of red light​

Answer 1

Answer:

1. The impression of the image on the retina lasts for about 1/16 th of a second after the removal of the object.

2. If a burning stick of incense is revolved at a rate of more than sixteen revolutions per second, a circle of red light is seen.

3. It is due to persistence of vision.

Explanation:

Persistence of vision :

The image of an object remains imprinted on our retina for 1/16 th of a second after the object is removed from the sight.

The sensation on the retina persists for a while.

This is called persistence of vision.