Included? Collapsible Light Holder,Periscope,F-Shaped Light Source,Light Trichromatic Illuminator,F-Shaped Holder,Protractor,Shade Plate,Convex Lens Concave Lens,Small Aperture Plate,Imaging Plate,Teal Plate,Semi-circular Sink,Plane Mirror,Eye Experiment Diagram,Trichromatic Plate ...Included? Collapsible Light Holder,Periscope,F-Shaped Light Source,Light Trichromatic Illuminator,F-Shaped Holder,Protractor,Shade Plate,Convex Lens Concave Lens,Small Aperture Plate,Imaging Plate,Teal Plate,Semi-circular Sink,Plane Mirror,Eye Experiment Diagram,Trichromatic Plate,1 Double Convex Lens,1 Single Concave Lens,1 Acrylic Glass Block,1 Single Convex Lens,1 Double Concave Lens,1 Triangular Prism,1 Three Way Linear Light Source,1 Multi-functional Reflector,1 Color Box,1 360°Angle Diagram Tips? This three-beam light source can be adjusted to change the direction of the light through the three small holes in the top to make the light sources parallel.without battery? You need to configure it yourself? Product Features Easy to complete the optical refraction and reflection experimentsplane mirror reflection, diffuse reflection, convex mirror reflection, concave mirror reflection, refraction of light, convex lens refraction, lens refraction, trigonometry refraction,imaging with convex lens and small hole,three primary colors of light Learn to master the physical optics of refraction and reflection knowledge easilythe physical optics experiment set can clearly show the light from a medium into another medium, the direction of propagation changes, so that the light at the junction of different media deflection phenomenon, and light propagation to different substances, in the demarcation plane to change the direction of propagation and return to the original phenomenon in the material Quality ManufacturingThree way laser source, bright and clear light, the angle of light can be freely adjusted.