how to make Newton Disc Working Model for School Science Exhibition Project


Newton disc was invented by the great scientist Isaac Newton. This experiment basically consists of 7 colors in a single disc.

newton disk working model

These colors are rainbow colors. When the disc is rotated, the colors fade into a white color.

Thus, in simple terms, Newton mentioned that the white light is a combination of the seven colors of the rainbow.

This whole process or result is based on the principle of dispersion of light. This also follows a simple concept called as temporal optical mixing.

This means that when the disc moves very fast at a certain speed, the stimuli cannot differentiate between the colors and it looks like a white light.

In this video, we show a simple working model of Newton disc using materials that are easily available at home.

Materials Used:

  1. Small toy fan
  2. Small running battery
  3. Wire
  4. Cardboard with 7 colours of the rainbow attached in a circle(disc)

You use the resource/tools page section to find the tips where you can buy these materials used at a reasonable cost.

Detailed Video Show How To Make Newton Disc Working Model for School Science Exhibition Project

Questions and Answers:

  1. What is a
    newton disc experiment?

A. Newton disc experiment explains that when a disc made of seven colours of a rainbow moves very fast in a circular motion or rotates very fast, it appears that the disc is a white colour. This is because the stimuli can see it as a white light based on the concept of optical mixing.

2. What is the principle behind newton disc?

A. The Newton disc is based on a simple concept called as optical mixing where any two or more lights when together cannot be distinguished emitting like a white light or a single colour light to the stimuli. This is very different from the concept of physical mixing of the lights.

3. Explain the importance of the concept of newton disc?

A. Newton’s disc theory was developed to demonstrate the persistence of vision.


Newton disc experiment is also called as concept of Newton’s colour wheel theory or colour disk theory because all the seven colours are on a single disc that are arranged as petals equally.

The perception of the colour stays for a fraction of second to the human eye. When the disc rotates fast enough, the colours all together appear to be white.

It is based on a theory of optical mixing and additive colour theory which states that any two colours or more colours mixed together will lead to a different colour to the human eye when they are put together.

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