Product name: Large optical benchProduct Type: Optical ExperimentProduct use: Convex/concave lens imaging method/determination of focal lengthStructure: removableProduct weight: 1.8KGProduct size: 12 * 96cminclude:Large optical bench*1Light source *1White screen*11 word screen*1Plastic Frosted Glass Screen*1Plano-convex lens *1Double concave lens *1Double convex lens *2Candle holder*1Brightly plated metal rodnote:If you have any questions about the product, you can write to us and we will answer your questions as soon as possible Optical experiment, physics teaching instrument, physics experiment,Study the propagation path of light,Convergence of light, Light divergence, Refraction of light, Straight propagation of light Lightweight and Precise Parallel Bar Optical Bench with Scale, Includes a set of accessories for lens and mirror experiments Through experiments on multiple projects, understand how light travels, reflect, refract and study optics The guide rails are marked with scales to facilitate observation and sumThe clearly illustrated manual encourages critical thinking by asking you questions before and after doing the experiments Ideal for teachers, home school, and young scientist. Ideal for teachers, home school, and young scientist Size One Size Brand Name FYYKXWD Unit Count 1.0 Count Item Weight 3500 Grams Manufacturer FYYKXWD Model Number FYYKXWD Is Assembly Required No Age Range Description Adult Manufacturer Part Number FYYKXWD