Crookes Radiometer Solar Light Vane Spinning Glass Globe

Watch Science Come to Life — The Crookes Radiometer

The HUXUAN Crookes Radiometer is a captivating all-glass scientific instrument that visually demonstrates how light energy is converted into motion. First invented in 1873 by chemist Sir William Crookes, this elegant device features four bi-colored vanes suspended on a low-friction spindle inside a partially evacuated glass globe. When light hits the vanes, they begin to spin — no batteries, no motors, no electricity required. The brighter the light, the faster the spin!

Simply place it near a sunny window or under an incandescent bulb and watch the magic unfold. It's a fascinating conversation starter, a stunning desk piece, and a wonderful educational tool all in one.

Made in Mainland China.

Key Features

• Powered by light alone — reacts to sunlight, incandescent light, and even infrared warmth from a nearby hand
• All-glass construction — beautiful clear globe, approximately 3.5 inches (8.9 cm) in diameter, standing 8 inches (20 cm) tall
• Partial vacuum interior — four lightweight bi-colored vanes rotate on an ultra-low-friction spindle
• No batteries needed — 100% light-powered with zero operating costs
• CE certified — meets European safety standards
• Perfect gift — ideal for science enthusiasts, curious minds, students, educators, and home decorators

Specifications

What's in the Box

• 1 × Crookes Radiometer (glass)

How to Use

1. Place the radiometer near a window with direct sunlight or directly under an incandescent light bulb.
2. Watch as the vanes begin to rotate — dark sides retreating from the light, light sides advancing.
3. The more intense the light source, the faster the vanes will spin!

Note: The radiometer works best with sunlight or incandescent bulbs. LED and fluorescent lights may produce slower or no rotation due to lower infrared output.

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Frequently Asked Questions

Q: Does the Crookes Radiometer require any batteries or electricity to operate?

A: No — the Crookes Radiometer is entirely powered by light. It requires no batteries, wiring, or electrical connection of any kind. Simply expose it to sunlight or an incandescent light source and the vanes will begin to spin on their own.

Q: What type of light works best with the Crookes Radiometer?

A: Direct sunlight and incandescent bulbs produce the best results, as they emit infrared radiation that drives the vane rotation. LED or fluorescent lights may produce slower rotation or none at all due to their lower infrared output.

Q: Is the Crookes Radiometer safe to display at home or in an office?

A: Yes. The radiometer is CE certified and made entirely of glass. It is a passive, non-electrical display piece. As with all glass items, it should be handled with care and kept out of reach of young children to avoid breakage.

Q: What are the dimensions of this Crookes Radiometer?

A: The glass globe measures approximately 3.5 inches (8.9 cm) in diameter, and the entire piece stands about 8 inches (20 cm) tall. Overall footprint dimensions are approximately 14 cm × 7.5 cm. Please allow 1–3 mm variance due to hand measurement.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.