4 Blades Rotating Glass Windmill Solar Powered B
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In stockThe Story
This magnificent glass radiometer, invented by Sir William Crookes in 1873, demonstrates the conversion of light into energy. Place it near a window or under incandescent light to watch the four vanes rotate, with the dark sides retreating from the light source. Made entirely of glass, it stands 8 inches tall with a 3.5-inch globe, making it an educational tool and a unique gift.
add_circle The Upside
- check Educational demonstration of light energy conversion
- check Unique decorative piece for windowsills or desks
- check No batteries or electricity required
remove_circle The Downside
- close Requires direct light source to operate
- close Fragile glass construction
- close Limited practical use beyond decoration and education
Specifications & features
Key features
- check_circle 4 vertical lightweight metal vanes with polished and black sides
- check_circle Rotates when exposed to sunlight, artificial light, or infrared radiation
- check_circle All-glass construction with partial vacuum inside
- check_circle Globe diameter 3.5 inches, total height 8 inches
- check_circle Low friction spindle for smooth rotation
Specifications
Base Type
Transparent
Globe Diameter
3.5 inches
Material
Glass
Number of Blades
4
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