The refractive index of glass varies with the wavelength or color of the light used, a phenomenon known as dispersion.
Rainbows are made when the sun's light changes speed as it moves from one medium to another. This speed change causes the light of different colors to be refracted and dispersed at different angles. A rainbow is an arch of colours visible in the sky.
Width Prism: 15 cm | Width Wood: 10 cm
choosing a selection results in a full page refresh