Discovery Experiment Device Key benefits Clear demonstration that rays are mainly heat, with an obvious, easytofollow setup for students and instructors. Simple operation enables quick setup, seamless classroom or lab use, and reliable observations of heat radiation and ray emission. Integrated optical path and modular design provide a straightforward discovery workflow without complex alignment. Materials and components include a parallel white light source, a triangular beam splitter, a dark box, and a receiver, supporting practical optics and radiative experiments. Threepart architecture offers focused roles: discovery experimenter for exploration, property specifier for material observations, and controller for coordination and control. How it works A heating object (copper or iron ball) emits rays when heated, and the heating object is placed at the focal point of a concave mirror to demonstrate radiative ray behavior. The device uses a parallel white light source to illuminate the setup, with a triangular beam splitter to direct beams toward the receiver, enabling clear observation of the ray paths. The dark box reduces ambient light to improve visibility of the rays and reflections during demonstrations. What is included or composed Parallel white light source Triangular beam splitter Dark box Receiver The instrument is structured into three parts: discovery experimenter, property specifier, and controller. Use scenarios Classroom demonstration: visually confirm that heated objects emit rays and that placing the heated object at the focal point of a concave mirror reveals the ray paths clearly. Physics laboratory exercise: explore heat radiation and optical ray propagation using the integrated light source, beam splitter, dark box, and receiver to capture and study rays. Studentguided investigations: perform guided discovery with the threepart instrument set to identify material properties (copper or iron ball) and control experimental parameters through the discovery experimenter, property specifier, and controller. Technical notes The system is designed around standard optical components and a heating object suitable for radiative demonstration (copper or iron ball) placed at the concave mirror's focal point. The parallel white light source, triangular beam splitter, dark box, and receiver collectively support clear visualization and measurement of ray behavior in relation to heat. This description preserves the original product's brand, specifications, models, and functions while presenting a clear, professional, and userfocused overview suitable for customers seeking an educational optics and heat demonstration device.