In the figure given below. a narrow beam of white light is shown to pass through a triangular glass prism. After passing through the prism, it produces a spectrum XY on the screen.

Name the phenomenon.

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 ? .

For a light ray passing through a prism

What happens to white light when it passes through a prism?

Does a beam of white light give a spectrum on passing through a hollow prism ?