Question

How does the dispersion of white light take place when it passes through a glass prism?

Answer 1

Violet is bent the most and red the least because violet light has a shorter wavelength, and short wavelengths travel more slowly through a medium than longer ones do. Because white light is made up of ALL visible wavelengths, its colors can be separated (dispersed) by this difference in behavior.

Answer 2

the white light divides into seven colour (vibgyor), due to difference in wavelength and speed of every colour ray is different