see the diagram
Dispersion of light is the phenomenon of splitting of white
light into its constituent colors. Dispersion happens when white light
passes through a glass prism. The different colors of light waves
have different speeds in any medium like glass. They have different
bending amounts after refraction. Hence, they show up separately beside
These colors are Violet, indigo, blue, green, yellow, orange, and red.
The rainbow also is formed due to dispersion of light waves at tiny
water droplet interface with atmospheric air. Please see the diagram for
the related geometry.
dispersion of light is observed when some oil spills over water. We observe colors splitting from refraction from water, oil surfaces.
dispersion is observed after rain during the morning or in the afternoon.
constituents of light are : Violet, Indigo, Blue, Green Yellow Orange and Red colors.