A narrow beam of white light is shown to pass through a triangular glass prism.
Channel: Doubtnut
Date: 26/07/2020

A narrow beam of white light is shown to pass through a triangular glass prism. After passing through the prism, it produces a specturm XY on a screen.  (a) State the colour seen at `X and Y`.  (b) Why do different colours of white light bend through different angles with respect to the incident beam of light ?