1. Introduction
The EXBEPE Physics Optics Experiment Set GX-2505 is designed to facilitate hands-on learning and understanding of fundamental physical optics principles. This comprehensive kit allows users to explore phenomena such as light refraction, reflection (plane, diffuse, convex, concave), convex lens imaging, small aperture imaging, and the three primary colors of light.
The set is suitable for educational purposes, providing clear demonstrations of how light behaves when passing through different media or interacting with various surfaces. The components are manufactured with quality materials, including a three-way laser source for bright and adjustable light, and acrylic prisms and lenses for excellent light transmission and clear refraction effects.
2. What's Included
The EXBEPE Physics Optics Experiment Set GX-2505 includes the following components:
- 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

3. Setup Instructions
- Unpack Components: Carefully remove all items from the packaging and verify against the "What's Included" list and Figure 2.1.
- Battery Installation (Three Way Linear Light Source): The three-way linear light source requires batteries (not included). Open the battery compartment, insert the required batteries, and close the compartment. Ensure correct polarity.
- Assemble Light Holder: If using the collapsible light holder, assemble it according to the diagram provided in the kit.
- Prepare Workspace: Set up your experiment on a flat, stable surface. A darker environment may enhance visibility for certain light experiments.
- Position Components: Place the F-shaped holder and other components as needed for your specific experiment.
Important: The 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.
4. Operating Instructions: Experiments
4.1. Reflection of Light Experiments
Reflection of light occurs when light propagates into a different medium, and at the demarcation surface, a portion of the light changes direction and returns to the original medium.

- Specular Reflection: Use the plane mirror and the light source to observe how light reflects off a smooth surface, where incident rays reflect in a single outgoing direction.
- Diffuse Reflection: Use a rough surface (e.g., the shade plate) to observe how light scatters in multiple directions upon reflection.
- Convex Mirror Reflection: Position the convex mirror to observe how it diverges light rays and forms a smaller, virtual image.
- Concave Mirror Reflection: Position the concave mirror to observe how it converges light rays and can form both real and virtual images depending on object distance.
- Periscope Experiment: Assemble the periscope using two plane mirrors. Observe how light is reflected twice to allow viewing around obstacles.
- Plane Mirror Imaging Experiment: Use the plane mirror to observe the formation of an upright, equal-sized virtual image that is laterally inverted (opposite left and right, same up and down).
Law of Reflection: Shine a beam of light onto one side of the scale plate. The incident light and reflected light are shown on both sides. When the reflected light side of the scale plate is turned back, the reflected light disappears, indicating that the reflected light, incident light, and the normal all lie in the same plane.
4.2. Refraction of Light Experiments
Refraction of light is the phenomenon where light is projected obliquely from one medium into another, causing its direction of propagation to change (deflect) at the junction of the different media.

- Refraction with Semi-circular Sink: Place the semi-circular sink on the protractor. Shine the light source through the sink. Observe the path of light without water. Then, add water to the sink and observe how the light beam bends as it passes from air to water and back to air.
- Convex Lens Refraction and Imaging: Use the convex lens with the F-shaped light source and imaging plate. Adjust the positions to observe how the convex lens converges light rays to form an image. This demonstrates the principles of imaging used in cameras and other optical instruments.
4.3. Straight-line Propagation of Light
Light travels in straight lines, a principle demonstrated through small hole imaging and shadow formation.

- Small Hole Imaging: In a relatively dark environment, set up the F-shaped light source, a blackboard with a small hole, and an imaging screen. Adjust the components to align the center of the F light source, the small hole, and the imaging screen. Move the imaging screen to observe the size, distance, and orientation (positive inverted) of the image formed by the small hole.
- Shadow Formation: The straight-line propagation of light explains why opaque objects cast shadows. When light shines on an opaque object, the area behind it where light cannot reach forms a shadow. This principle is evident in natural phenomena like solar and lunar eclipses.
4.4. Three Primary Colors of Light
Red, Green, and Blue (RGB) are the three primary colors of light. Combinations of these colors can form all other colors.

- Color Mixing: Use the Light Trichromatic Illuminator. Turn on the three switches (Red, Green, Blue) in turn. Observe the color changes in the overlapping areas of light and shadow. Overlapping two primary colors creates a secondary color (e.g., Red + Green = Yellow). Overlapping all three primary colors (Red + Green + Blue) produces white light.
4.5. Lenses and Prisms
The kit includes various lenses and prisms for exploring different optical properties.

- The kit contains various types of lenses (convex, concave, double convex, double concave, single convex, single concave) and prisms (triangular, acrylic glass block).
- These components are used to demonstrate light convergence, divergence, and dispersion.
- Refer to the specific experiment diagrams for proper placement and use of each lens and prism.
5. Maintenance
- Cleaning: Gently wipe lenses, mirrors, and other optical components with a soft, lint-free cloth. For stubborn smudges, use a small amount of lens cleaning solution. Avoid abrasive materials that could scratch surfaces.
- Storage: Store all components in their original packaging or a designated storage box to prevent damage and loss. Keep the set in a cool, dry place away from direct sunlight and extreme temperatures.
- Battery Care: Remove batteries from the three-way linear light source if the kit will not be used for an extended period to prevent leakage.
- Handling: Handle optical components by their edges to avoid leaving fingerprints on the optical surfaces.
6. Troubleshooting
- Light Source Not Working:
- Check if batteries are installed correctly and are not depleted.
- Ensure the power switch is in the "ON" position.
- Unclear Images/Light Paths:
- Ensure all optical components (lenses, mirrors) are clean and free of smudges or dust.
- Verify that components are aligned correctly according to the experiment diagrams.
- Perform experiments in a sufficiently dark environment for better visibility of light paths.
- Missing Components:
- Refer to the "What's Included" list and Figure 2.1 to confirm all parts are present. If any are missing, contact customer support.
7. Specifications
| Brand Name | EXBEPE |
| Model Number | GX-2505 |
| UPC | 768447477198 |
| Material Type | ABS, Acrylic |
| Item Dimensions (L x W x H) | 12.5 x 7.8 x 3 inches |
| Educational Objective | STEM, Physics Optics |
| Assembly Required | No (minor setup for experiments) |
| Minimum Age (Manufacturer) | 181 Months (approx. 15 years) |
8. Customer Support
EXBEPE is committed to providing high-quality products. If you encounter any problems with your Physics Optics Experiment Set GX-2505 or if the product does not meet your expectations, please contact our customer service directly. We aim to resolve any issues within 24 hours to ensure your satisfaction.
For support, please refer to the contact information provided with your purchase or visit the official EXBEPE store page on Amazon.