Question

Why do white light get scattered into its component colours when it passes through a prism

Answer 1

Dispersion of light occurs when white light is separated into its different constituent colors because of refraction and Snell's law. White light only appears white because it is composed of every color on the visible spectrum. Although they are very close, the index of refraction for each color is unique in non-vacuous materials. These unique indices cause each wavelength to follow a different path.

Answer 2

because its component which is violet indigo blue green yellow orange and red are deviated into different angles to form a spectrum.