About This

• The fins are polished or white on one side and black on the other. When exposed to sunlight, artificial light or infrared radiation (even the heat from a nearby hand can be enough), the fins rotate without apparent driving force, the dark sides remove from the source of radiation and the sides of the light moving forward.
• Simply place it near a window or under direct incandescent light, the car blades only rotate under the effect of light (sunlight or incandescent). The light shines on the globe, the dawn turns quickly.
• Subject: Physical; Inside the bulb, on a low coefficient of friction, finds a rotor with several (usually four) vertical light metal fins spaced equally around the axis.
• The beautiful glass radiometer makes a great for anyone who has everything.
• All made of glass. This physical and technical miracle clearly shows you how sunlight is converted into energy. Place near a window or under incandescent light and observe the rotation of the flights.