Question

Make Newton’s disc by painting the constituent colours of white colour of white light in the same order and proportion.
In which colour does the disc appear when rotated fast?

Answer 1

Hint: Let us get some idea about Newton’s disc. The Newton disc, also known as the Disappearing Color Disc, is a well-known physics experiment in which a spinning disc of various coloured segments appears white when spun very quickly. Temporal optical mixing is a form of additive-averaging mixing in which light stimuli are mixed in this way.

Complete step-by-step solution:
Then Newton discovered the primary colours red, orange, yellow, green, blue, "a violet-purple," and indigo in this way. As he combined the coloured rays from a prism, he discovered that "the most unexpected and wonderful composition was that of whiteness," which required all of the primary colours to be "mixed in a due proportion."
When a spinning disc with segments in various colours (usually Newton's primary colours: red, orange, yellow, green, blue, indigo, and violet or ROYGBIV) spins very quickly, it appears white (or off-white or grey).
Temporal optical mixing is a form of additive-averaging mixing in which light stimuli are mixed in this way. \[{1^{st}}\] Persistence of vision refers to the idea that human vision is unable to discern fine details of fast-moving objects.

Note: Isaac Newton is commemorated on the disc. It's unclear if he ever used a spinning disc to illustrate the concepts of light, despite publishing a circular diagram with segments for the primary colours he'd found.