Explain the phenomenon of dispersion of white light through a glass prism,using a suitable ray diagram.

(N/A) Dispersion is the phenomenon of splitting of white light into its constituent colours when it passes through a glass prism.
When a beam of white light enters a glass prism,it gets refracted and splits into a band of seven colours: Violet,Indigo,Blue,Green,Yellow,Orange,and Red $(VIBGYOR)$.
This splitting occurs because different colours of light travel at different speeds in the glass medium,and thus,they undergo different amounts of deviation.
Violet light bends the most because it has the shortest wavelength,while red light bends the least because it has the longest wavelength.
The resulting band of colours is called a spectrum.