Question

What is spectrum of white light ? Why do different coloured rays deviate at different angles on passing through a glass prism ? Explain the method of recombining the different components of white light.

Answer 1

The band of the coloured components of white light. Refractive index speed of light is different for different colours.  By placing a second identical prism in an inverted position with respect to first prism (Proper explanation is to be given) diagram with labelling.