Crookes Radiometer Single For Physics Lab Manufacturer,Supplier and Exporter
Product Code : SEL-PLE-10258
Quick Answer: Infrared radiation drives the four black-and-white vanes of this Crookes radiometer round inside a partly evacuated glass bulb of approx. 70 mm diameter, giving a visual demonstration of several physical effects.
Last updated: October 2026
Key Features
- Partly evacuated glass bulb, approx. 70 mm diameter
- Fine central pivot supporting four lightweight metal arms
- Each vane blackened on one side and white on the reverse
- Vanes turn as infrared radiation heats the black faces
- Mounted on a round plastic base
Technical Specifications
| Specification | Value |
|---|---|
| Bulb | Glass, partly evacuated, approx. 70 mm diameter |
| Vanes | Four lightweight metal arms, black on one side, white on the other |
| Pivot | Fine pivot at the centre of the bulb |
| Base | Round, plastic |
About This Product
Infrared radiation warms the black faces of the vanes more than the white ones, and the resulting pressure difference on either side of the vanes drives them round. Explaining that movement brings in thermal radiation and absorption, thermal transfer, air pressure and the momentum of gas molecules, so the radiometer suits class discussion as well as demonstration. The Crookes Radiometer Single For Physics Lab can be packed for export to the Central African Republic, Lithuania, Tunisia, the Democratic Republic of the Congo, Vietnam and Uganda.
Frequently Asked Questions
Why do the vanes turn?
Infrared radiation heats the blackened faces more than the white ones, creating a pressure difference on either side of each vane that drives the vanes round.
Which topics can it be used to discuss?
Thermal radiation and absorption, thermal transfer, air pressure and the momentum of gas molecules.
Related: Physics Lab Equipment, Kinetic Theory Apparatus, Convection Tube For Physics Lab, Bourdon and Vacuum Gauge.
For a quotation on the Crookes Radiometer Single For Physics Lab, contact School Educational Instrument.
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