The concave mirror with a focal length of 20 cm and a diameter of 75 mm is a precisely crafted optical component designed for both educational and experimental use. Constructed from high-quality glass and coated with a superior reflective layer, this mirror delivers clear, accurate reflections with minimal distortion. Its finely curved concave surface allows for the convergence of parallel light rays to a single focal point, making it ideal for demonstrations involving light reflection, image formation, and focal point behavior in physics laboratories, classrooms, and scientific environments.
Description
Product Overview : Concave Mirror Glass
The Concave Mirror Glass with a focal length of 20 cm and a diameter of 75 mm is an educational optical component designed for physics laboratories and classroom demonstrations. This mirror helps students understand the behavior of light through reflection and image formation. Because optics concepts rely heavily on observation, this mirror supports clear and accurate learning through practical experiments.
Optical Quality and Reflective Performance : Concave Mirror Glass
This concave mirror uses premium optical-quality glass that ensures high transparency and surface accuracy. A high-grade reflective coating enhances light reflection and produces bright, well-defined images. As a result, students can observe both real and virtual images clearly by adjusting the object position along the principal axis.
Focal Length and Image Formation
The 20 cm focal length provides a balanced working distance for standard laboratory setups. This focal length allows easy demonstration of image formation cases, including magnified, diminished, real, and virtual images. Therefore, teachers can explain ray diagrams, focal points, and image characteristics effectively during practical sessions.
Diameter and Light Collection
With a 75 mm diameter, the mirror offers a wide aperture that captures and reflects a larger amount of incident light. This feature improves image brightness and clarity during experiments. Moreover, the precisely engineered curvature ensures consistent focal behavior across the mirror surface, which supports accurate experimental results.
Accuracy and Durability
The mirror features a polished surface with uniform curvature, which minimizes optical distortions such as spherical aberration. Its reflective coating resists tarnishing and environmental degradation. Because of this robust construction, the mirror maintains reliable performance even with repeated laboratory handling.
Compatibility with Laboratory Equipment
This concave mirror fits standard laboratory mounts and optical bench systems. Educators can easily combine it with light sources, screens, lenses, and prisms for advanced optical experiments. As a result, students can study focal length measurement, magnification, and reflection laws in a structured setup.
Educational Applications and Learning Outcomes
Students use this mirror to explore fundamental optics concepts such as ray tracing, reflection laws, and image characteristics. Hands-on experiments improve conceptual clarity and analytical skills. Furthermore, the mirror helps bridge the gap between theoretical diagrams and real optical behavior.
Conclusion
Overall, the Concave Mirror Glass with 20 cm focal length and 75 mm diameter offers accurate optical performance and long-term durability. Because it combines precise curvature, high reflectivity, and compatibility with laboratory setups, it remains an essential teaching aid for physics education and optical experiments.

This educational working model can be effectively integrated with other educational working models and laboratory kits to enhance hands-on learning in engineering and technical laboratories. In addition, institutions may also explore complementary learning solutions such as Jaadui Pitara educational learning kits to support interactive and concept-based education.