Specifications:Product Name: Optical Experiment BoxType: Physics Teaching InstrumentMaterial: AcrylicWeight: About 435gSize (L × W × H): 23.5cm × 16cm × 5cm Features:- Used To Explore The Propagation Path Of LightUsing a laser source, in a slightly dark space, you can clearly observe the propagation path of light in the air;- Homemade Corner ReflectorTry to make a corner reflector with the two flat mirrors provided;- Homemade PeriscopeFind a toothpaste box (or similar carton), open a small opening near the ends of the box, each with a flat mirror, two plane mirrors parallel to each other, and at an angle of 45° to the horizontal plane, to make the easiest periscope. Package Included:1 Pcs × Angle Dial Screen (with box)1 Pcs × Small Sink1 Pcs × Spherical Mirror (Both sides are convex mirror, concave mirror)1 Pcs × Convex Lens1 Pcs × Concave Lens1 Pcs × Glass Brick1 Pcs × Triangular Prism2 Pcs × Flat Mirror1 Pcs × Brown Glass Plate (Flat mirror)3 Pcs × Chess Pieces1 Pcs × Light Source (Three-way laser source)1 Pcs × φ30 Lenticular Lens Frame