Solar Radiometer with Crookes Vanes — decorative solar windmill for desk and home Capture sunlight and turn it into gentle motion. This solar radiometer uses classic Crookes vanes to convert light into visible rotation, creating a calm, kinetic display that works as a decorative accent and a simple demonstration of radiometric effect. Key benefits Visual indicator of light and sunlight intensity: the vanes rotate when exposed to light, making it easy to see changes in illumination. Adds motion and interest to any workspace or room: a subtle, moving focal point for desks, windowsills, shelves, or reception areas. Simple and low maintenance: operates using light energy, no batteries or cords required. Educational and conversationstarting: demonstrates a classic physical principle in a compact, appealing form. Giftready and unobtrusive: suitable as a thoughtful desk or home gift for students, hobbyists, or anyone who appreciates mechanical toys. Function and performance Mechanism: Crookesstyle vanes rotate in response to light, producing a windmilllike motion when exposed to direct sunlight or strong indoor light. Performance: provides noticeable rotation under bright light conditions and a smooth, continuous motion while illuminated. Operation: designed for easy setup on flat surfaces and for frequent use as a visual display or handson demonstration. Compatibility and placement Ideal locations: desks, office cubicles, classroom demonstration tables, windowsills, living room displays. Placement guidance: position where it receives direct or strong ambient light for motion. Practical use scenarios Office desk: place near a sunny window to add gentle motion and a calm focal point during work sessions. Classroom or science demo: use as a tangible example to show how light can induce motion, supporting lessons on energy and radiation. Gift or decorative display: give as a unique home or desk gift to students, teachers, or designminded colleagues. Care and handling Place on a stable, flat surface. Keep the vanes and viewing area of dust for consistent performance. Avoid prolonged exposure to extreme conditions or moisture. This solar radiometer offers a compact, decorative, and educational way to turn sunlight into motion while fitting seamlessly into home and office environments.