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Dispersion is the effect of light being separated into its specific wavelengths. A classic example is a white beam of light sent through a glass prism. Because each wavelength has its own refraction value, a white light beam is spread into it's rainbow color components. Light also interacts with the molecular structure of the material it is sent through, according to its wavelength. Now you can take advantage of Dispersion with finalRender R3.

The 2x images below demonstrate the effect of dispersion. The white "color" of the cylinders behind the sphere is dispersed into a rainbow of colors, of which white light is comprised.