Question

what can you demonstrate by rotating Newton's colour disc rapidly​

Answer 1

Answer:

Newton disc contains the transparent films of different colours like violet, indigo, blue, green, yellow, orange and red. This disc when rotated very quickly gave a white or off white colour. There lies the optical mixing of the colours wavelength to give a white colour.

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Answer 2

Answer:

By rotating Newton's colour disc rapidly​, we can demonstrate that the white light consists of 7 colours. Red, Orange, Yellow, Green, Blue, Indigo and Violet mix to form White.