UPSC 2013 CDS 2 GK Paper

Dispersion process forms spectrum due to white light fallingon a prism. The light wave with shortest wavelength refracts themost. The refraction (deviation in the path of the light) is inverselyproportional to the wavelength so red light -that has the highestwavelength- suffers the least amount of deviation and violet withleast wavelength refracts the most