Question

Mechanical arrangement used to demonstrate composition of white light

Answer 1

Answer:

Newton disc with several colour is used to demonstrate the white light

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Answer 2

As a result, Newton understood that when white light passes through a transparent medium (like air) into another (like glass), its components are deflected the first time according to their colour, and once again when they reemerge (back into air, for example). This creates a spread of coloured light rays from red to violet, like the colours of the rainbow.

This ordered separation of coloured rays is known as the “spectrum”. The spectrum of white light consists of six basic colours arranged in a specific order: red, orange, yellow, green, blue and violet.

Although Newton understood that a beam of light of a particular colour is always deviated by the same amount, he did not appear to understand why this is so. More than a century would pass before another British scientist by the name of Thomas Young would provide part of the answer.