When a narrow beam while light is passed through a glass prism, the different wavelength travel thorugh the glass at

In the above figure 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 a screen. State the colour seen at (i) X and (ii) Y.

When a beam of white light passes through a glass prism, the colour of light beam that deviates the least is

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.

What is dispersion ? What happens when light is passed through a glass prism ?