Description: 【Polarization Control】: This instrument includes both a polarizer and an analyzer, enabling effective manipulation of light polarization. The polarizer converts natural light into linearly polarized light, while the analyzer detects the direction and degree of polarization 【Versatile Applications】: Ideal for physical optics experiments, this device is indispensable in educational settings and research institutions alike. It plays a crucial role in experiments involving optical properties, wave interference, and diffraction studies 【Friendly Design】: With its simple and intuitive design, the polarizer and analyzer are easy to install and remove. This allows seamless integration with other optical instruments such as light sources or screens, facilitating various experimental setups 【Construction】: The sturdy material ensures durability against repeated use and physical wear during experiments, extending the product's lifespan while maintaining performance integrity 【Educational Value】: As a teaching aid, this product vividly demonstrates polarization phenomena to students, enhancing their understanding of complex optical concepts like Malus's Law through hands experience—boosting both interest in learning and practical skills Size Chart: Diameter:6cm/2.36inch Height:3.5cm/1.38inch Package Includes: 1 set Physical Optics Polarization Observer Note: 1.This is not infant toy , please take away from children to avoid eating. 2.Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.