Скачать или смотреть Snell's law angular dispersion of white light by water: angle between red and violet rays.

Snell's law angular dispersion of white light by water: angle between red and violet rays.

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We are given the indices of refraction for different colors of visible light. Different wavelengths have different indices of refraction, and the index of refraction for violet light is slightly greater than the index of refraction for red light. This causes a phenomenon called "dispersion" where the light spreads out into its component wavelengths. Our goal here is to compute the angular size of the dispersion by looking at the refraction of the longest wavelength (red) and the shortest wavelength (violet). We compute the angle of refraction using Snell's law for each wavelength, then take the difference to get the angular size of the dispersion pattern rainbow.