Radiometer Crooke’s Manufacturer,Supplier and Exporter in India
Product Code : EL-PS-10572
Quick Answer: The Radiometer Crookes is a glass bulb with black and white vanes inside that spin in sunlight or in the beam of a bright torch. It is approximately 120 mm high and 75 mm in diameter.
Last updated: October 2026
Key Features
- Black and white vanes inside a glass bulb
- Vanes spin in sunlight or in a bright torch beam
- Converts radiation into mechanical motion
- Brighter light makes the vanes spin faster
- Size approximately 120 mm high × 75 mm diameter
Technical Specifications
| Specification | Value |
|---|---|
| Vanes | Black and white |
| Housing | Glass bulb |
| Size | Approx. 120 mm high × 75 mm diameter |
| Light source | Sunlight or the beam of a bright torch |
About This Product
A Crookes radiometer shows light energy being changed into mechanical motion. When light falls on the vanes inside the glass bulb they begin to turn, and they turn faster as the light gets brighter. In class it is used to discuss radiation, heat and energy transfer. Pupils can place it in sunlight or move a torch closer and further away, then record how the rate of spin changes with the brightness of the light. School Lab Equipment India can export the Radiometer Crookes to education buyers in Burkina Faso, Bolivia, Vietnam, Slovenia, New Zealand and Uzbekistan.
Frequently Asked Questions
Q1. What size is the Radiometer Crookes?
It is approximately 120 mm high and 75 mm in diameter.
Q2. What makes the vanes spin?
Placing the radiometer in sunlight or in the beam of a bright torch makes the black and white vanes spin, and brighter light makes them spin faster.
Related: Physical Sciences, Maxwell's Wheel, Pendulum Simple Machine, Snap Circuits Educational Version.
For a quotation on the Radiometer Crookes, contact School Lab Equipment India.