Question

A narrow beam of white light is shown passing through a triangular glass prism. After passing through the prism it produces a spectrum XY on a screen

Answer 1

Answer:

in the year 1665 Newton discoverd by his experiment with glass prisms that white light consists of a mixture of seven colours...when beam of white light is passed through a triangular prism ,the white light splits to form a band of seven colours on a white screen (red, orange, yellow,green,blue, indigo,and violet)

denoted by the word VIBGYOR