Why do different colours deviate through different angles on passing through a prism ?

Which colour deviates (i) most (ii) least on passing through a prism ?

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 ? .

Statement I : White light gets dispersed when passed through a prism. Statement II: Different colours are deviated through different angles due to which white light splits.