Features: The delicate appearance of an optical glass triangle prism can be given as a gift, used as a tool for studying spectra in scientific experiment teaching, or used in photography to achieve some unexpected effects. You can explain to children that light actually consists of a series of colors, talk about how rainbows form, and then reinforce the message by demonstrating. Optical glass can create bright and beautiful rainbows by splitting light beams into different spectral components, which is beneficial to the teaching of 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: 40 * 40 * 180mm / 1.6 * 1.6 * 7.1in Package list: 1 x Triangular Prism 1 x Gift box