Question

Q1. What is a Newton's disc? How does it show that light is composed of many
colours?​

Answer 1

Answer:

A Newton disc is a disc with segments in rainbow colours. When the disc is rotated, the colors fade to white; In this way Isaac Newton demonstrated that white light is a combination of the seven different colours found in a rainbow. ... A combination of red, green and blue in the circular disc will yield the same result.