Crooks Radiometer Solar Light Mill Amazing Science Toys
.Invented by the chemist Sir William Crookes in 1873, as a by-product of certain chemical research, radiometers are made of glass bulbs, most of which have been removed to form a partial vacuum.
.Inside the bulb, on the low-friction main shaft, is a rotor with several (usually four) vertical lightweight metal blades distributed equidistantly around the shaft. One side of the blade is polished or white, and the other side is black.
.When exposed to sunlight, artificial light or infrared radiation (even the heat of nearby hands is enough), the blades rotate without obvious power, the dark side retreats from the radiation source, and the bright side moves forward. Just place it near a window or directly under an incandescent lamp, because the blades only rotate under the light (sunlight or incandescent lamp).
.Light Pressure Windmill: It is a kind of amazing solar energy scientific experiment equipment. Put it in the sun or irradiate it with an incandescent lamp of about 100W. The Crooks radiometer blade will automatically rotate. If the light is turned off, the blade will Stop turning.
.Elaborate Production: Using high borosilicate glass material, the interior is close to vacuum. The total height is 138mm, the diameter of the sphere is 75mm, and the diameter of the base is 65mm. It is made by hand and has a simple structure.
.Science Education: This physical and technological miracle shows you in a clear way how sunlight is transformed into energy, which helps to develop children, students explore new ideas, and attract children to stimulate their interest in STEM science.
.Easy to Use: Placed near a window or incandescent lamp, when the light is illuminated, the black leaf surface absorbs heat energy, and the white leaf surface releases heat energy, which can push the four leaf surfaces to rotate.
.Creative Gift: The gorgeous and magical glass radiometer is a great gift for those who have everything. It is a technology decoration gift for family, children and friends.
Note: Due to manual measurement, please allow an error of 1-3mm. Please make sure you don't mind before buying. The color may be different due to different displays. Thanks for your understanding.
.Material: High Density Silicon Glass
.Total Height: 138mm
.Ball Diameter: 75mm
.Base Diameter: 65mm
.Product Dimensions: 7.5 x 7.5 x 13.8cm
.Product Weight: 100g
.Package Dimensions: 20 x 10 x 10cm
.Package Weight: 300g
.Packing: Carton Box
.1 x Crooks Radiometer