Crookes Radiometer Single
The Crookes Radiometer Single is a fascinating scientific apparatus designed to demonstrate the conversion of light energy into mechanical motion. Commonly known as a light mill, it consists of a glass bulb containing a partial vacuum and a lightweight rotor with vanes that are blackened on one side and polished on the other.
When exposed to a light source or radiant heat, the vanes spin as a result of the differential heating effect—showing the interaction between radiation and matter. The speed of rotation increases with the intensity of the light, making it an excellent tool for classroom demonstrations, physics experiments, and educational displays.
Comprising partly evacuated glass bulb approx. 70 mm. diameter, containing at its centre a fine pivot which supports four light weight metal arms. One side of each vane is blackened, the reverse side is bright. Mounted on round base The Crookes radiometer is a simple device comprising a partially evacuated glass bulb containing a set of vanes, typically with one black side and one reflective side. When exposed to light, the vanes rotate, demonstrating the conversion of light energy into mechanical motion. The exact mechanism responsible for this motion is still a topic of scientific inquiry and debate.
Features:-
- High-quality glass bulb with a precision-sealed vacuum.
- Lightweight, sensitive rotor for smooth motion.
- Vanes with contrasting black and white surfaces to illustrate radiation effects.
- Demonstrates principles of thermodynamics, radiation pressure, and energy transfer.
- Ideal for science classrooms, laboratories, and physics learning kits.
- Also serves as an attractive and intriguing decorative scientific gift item.