When sunlight is split by a prism?

The prism splits the white light into seven different colors. This splitting of white light into many colors is called as a dispersion of light. This shows that the sunlight consists of several colors. Sometimes in the rainbow, you may not see all the seven colors.

Can you use a prism to split light?

A dispersive prism can be used to break white light up into its constituent spectral colors (the colors of the rainbow). Furthermore, prisms can be used to reflect light, or to split light into components with different polarizations.