White light consists of various colours. When this light is refracted by a prism, the separate colours of white light become visible, because each colour is refracted differently in the prism. Each material causes a different refraction of the light. A liquid prism is devised to investigate these properties of fluids. The three larger prisms have filling plugs which can be removed by a special spanner. They can be suspended horizontally in the support, so that they can pivot around their longitudinal axis.
Pair of Prismatic cells
1750 - 1774