ITEM NAME:Crookes Radiometer Glass Light Mill Solar Power Educational Proving Vanes V0K4 Description: 100% new high quality Color: as shown Style: as shown Material: glass size: Base diameter: about 80mm / 3.1" Height: approx. 205mm / 8.1" Ball diameter: about 90mm / 3.5" Conversion: 1 inch = 2.54 cm or 1 cm = 0.393 inches Uses: All made of glass to make the interior close to vacuum. It can be rotated by light, and it can also be rotated in the opposite direction by cold air. It is a magical teaching instrument. principle: When the black leaf surface absorbs heat energy and the white leaf surface releases heat energy, it can push the four leaf surfaces to rotate. Package includes: 1 * Radiometer note: Allow 2-3cm error due to manual measurement The color of the items in the photos displayed on the computer monitor may be slightly different because the display is not calibrated the same.When the black leaf surface absorbs heat energy and the white leaf surface releases heat energy, it can push the four leaf surfaces to rotate. Uses: All made of glass to make the interior close to vacuum.
