The set of glass prisms is used for demonstrating the layout of an achromatic prism and direct-vision prism. The set consists of 1 flint glass and 2 crown glass prisms with sides of identical length. Material | Dimension | Height | Refractive Index Flint glass | 40x40x15 mm | 40 mm | 1.608 Crown glass | 40x40x30 mm | 40 mm | 1.515 Crown glass | 40x40x18 mm | 40 mm | 1.515