What is dispersion of light? Name the $(i)$ component of white light that deviates the least,$(ii)$ component of white light that deviates the most,while passing through a glass prism.

(N/A) Dispersion of light is the phenomenon of splitting of white light into its constituent seven colours when it passes through a transparent medium like a glass prism.
$(i)$ The component of white light that deviates the least is Red light because it has the longest wavelength.
$(ii)$ The component of white light that deviates the most is Violet light because it has the shortest wavelength.