When white light passes through a glass prism, it splits into its seven constituent colors, which is known as dispersion of white light . Violet, Indigo, Blue, Green, Yellow, Orange, and Red are among the colors visible. It is this difference in n value for the varying frequencies (and wavelengths) that causes the dispersion of light by a triangular prism. Violet light , being slowed down to a greater extent by the absorption and re-emission process, refracts more than red light . Learn how white light is spread into its spectrum of colors by refraction in a prism or a raindrop. Explore the applications and implications of dispersion in optics and modern physics. Dispersion of Light happens when white light is split into its constituent hues due to refraction. Dispersion of Light can be achieved through various means but the most common way to achieve dispersion of light is through Prism. Dispersion of light by a prism results in the breaking of white light into its seven constituents.