Question

Explain the set-up used by Newton to obtain a spectrum.

Answer 1

Sir Isaac Newton showed that when a thin ray of light passed through a triangular piece of glass known as prism, the light split into seven colors called spectrum. He allowed a thin beam of light to fall on a prism kept in a dark room. After passing through the prism, the light split into seven different colors, namely violet, indigo, blue, green, yellow, orange and red, collectively known as spectrum.