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Reflection takes place when the light does not pass into the material but is instead bounced off the surface. Q7 Refraction of Light Definition Of The Index Of Refraction The index of refraction n of a material is the ratio of the speed c of light in a vacuum to the speed v of light in the material. Black Aesthetic Discover Perspective Of Genesis Light Rays In Prism Ray Rainbow Spectrum Dispersion Optical Effect I Light Art Light Rays Light Installation The light is refracted both as it enters and as it leaves the drop. Comics in refraction reflection and dispersion of light ina rainbow . A rainbow is a meteorological phenomenon that is caused by reflection refraction and dispersion of light in water droplets resulting in a spectrum of light appearing in the sky. Chromatic dispersion occurs when a materials index of refraction is not a constant but a function of the wavelength of light. As the white light moves through the two faces of the prism the different colors bend different ...