Wolfram|Alpha has refraction calculators. Solve problems related to the index of refraction of seawater, the refractive index, Brewster's angle, the optical absorption coefficient of ice (I<sub>h</sub> phase), the refractive index of ice (I<sub>h</sub> phase), the wavelength of light in a medium compared to another medium, the wavelength of light in a medium compared to the vacuum, the refractive index of moist air, refraction in a prism, rainbow altitude, Snell's law, total internal reflection and the refractive index of water.
