Signedunsigned
FunctionPrisms are used to explain the properties of light refraction and to demonstrate how light from the sun, for instance, creates a spectrum of colors. A conical prism like this one produces a spectrum that has concentric circles of colors (from violet in the center to red on the periphery). In other words, a rainbow.
Related WorksPaolo Brenni, "Soleil, Duboscq, and Their Successors," Bulletin of the Scientific Instrument Society 51 (1996): 7-16
Paolo Brenni, Gli Strumenti di Fisica dell'Istituto Tecnico Toscano: Ottica (Prato: Giunti, 1993), 84-86.