Features: _x000D_ 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. _x000D_ 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. _x000D_ 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 _x000D_ 100% quality optical glass, made of K9 optical glass, with better refraction and clear reflection. _x000D_ The rainbow light displayed by the glass triangle prism is applied to the photographic effect and the filter of the camera lens _x000D_ _x000D_ _x000D_ Specification: _x000D_ Material:K9 Optical glass _x000D_ Size: 40 * 40 * 180mm / 1.6 * 1.6 * 7.1in _x000D_ _x000D_ Package list: _x000D_ 1 x Triangular Prism _x000D_ 1 x Gift box