Features: Thedelicate appearance of an optical glass triangle prism can be given as agift, used as a tool for studying spectra in scientific experiment teaching, or used in photography to achieve some unexpected effects. Youcan explain to children that light actually consists of a series of colors, talk about how rainbows form, and then reinforce the message by demonstrating. Opticalglass can create bright and beautiful rainbows by splitting light beamsinto different spectral components, which is beneficial to the teachingof chromatography in physics courses 100% quality optical glass, made of K9 optical glass, with better refraction and clear reflection. The rainbow light displayed by the glass triangle prism is applied to the photographic effect and the filter of the camera lens Specification: Material:K9 Optical glass Size: 30 * 30 * 60mm / 1.2 * 1.2 * 2.4in Package list: 1 x Triangular Prism 1 x Gift box.