Double Crookes Radiometer

Double Crookes Radiometer Specification

Speed Range
Vane Rotation Proportional to Light Intensity

Glass Type
Clear Borosilicate Glass

Accuracy
Qualitative Demonstration

Shape
Double Bulb Cylindrical

Temperature Resistance
Up to 80C

Features
Consists of Two Bulbs, Four-Vane Rotors, High Sensitivity, Mounted on Stable Base

Type
Double Crookes Radiometer

Dimension (L*W*H)
Approx. 120 mm x 50 mm x 160 mm

Equipment Type
Scientific Laboratory Instrument

Equipment Materials
Glass, Metal Support

Power
Operates by Light Energy (No External Power Required)

Material
Borosilicate Glass, Aluminium Vanes

Application
Physics Demonstrations, Study of Radiation Pressure, Science Laboratories

Mounting
On Metal Base

Vane Count
Each Radiometer with 4 Vanes

Vane Material
Aluminium, Black and Silver Coating

No. of Bulbs
2

Unit Weight
Approx. 200 g

Finish
Clear and Polished

Observation
Vane spins faster under intense light

Maintenance
Wipe Clean, Handle with Care

Packaging
Box Packed, Foam Protection

Operation Principle
Radiation Pressure / Thermomolecular Effect

About Double Crookes Radiometer

For demonstrating the mechanical effect of reflection and absorption of light and heart. Two partially evacuated glass bulbs, mounted one on top of the other, has four vanes each, which spin low friction pivot. Alternate vanes are dark and white in color. When exposed to sunlight, the vanes rotate in opposite directions.

Innovative Dual Bulb Design

Employing two cylindrical glass bulbs, the Double Crookes Radiometer enhances sensitivity and offers a greater range of demonstration possibilities in physics and science laboratories. The unique construction maximizes the visual impact of radiation pressure and thermomolecular effects when exposed to various light sources.

High-Quality Materials and Finish

Built from clear borosilicate glass for superior clarity and heat resistance, the radiometer includes precision aluminium vanes finished in contrasting black and silver coatings. This combination ensures optimal performance and durability, with a polished appearance suitable for any educational setting or laboratory.

Effortless Operation and Maintenance

Designed for ease of use, the radiometer automatically responds to light without the need for batteries or electrical connections. Maintenance is straightforward-simply wipe clean and handle with care to preserve the instrument's precision and appearance. Safe packaging includes foam protection for transport and storage.

FAQ's of Double Crookes Radiometer:

Q: How does the Double Crookes Radiometer operate?

A: The Double Crookes Radiometer functions by utilizing radiation pressure and the thermomolecular effect. When exposed to light, the black and silver aluminium vanes inside each bulb rotate, with the speed of rotation directly proportional to the intensity of the light, visually demonstrating the principles of radiation pressure.

Q: What is the benefit of the double bulb design compared to a standard radiometer?

A: The dual bulb design increases observation opportunities and sensitivity, enabling more detailed demonstrations and comparative study scenarios in physics experiments. It is especially valuable for illustrating advanced concepts in science laboratories and classroom settings.

Q: Where can this radiometer be used effectively?

A: This scientific instrument is ideal for educational settings such as physics classrooms, science laboratories, and demonstration workshops. Its qualitative performance makes it suitable for both teaching fundamental principles and supporting hands-on exploration of radiant energy concepts.

Q: What is the recommended process for setting up and operating the instrument?

A: To use the radiometer, simply place it on a stable surface in a well-lit area. Expose it to a light source-observing as the vanes in both bulbs begin to rotate. No external power or complex setup is necessary, as it is fully powered by ambient light.

Q: What precautions should be taken when handling the radiometer?

A: As the device is crafted from borosilicate glass and contains delicate internal components, handle the instrument with care. Avoid exposure to extreme temperatures (beyond 80C), and clean only by lightly wiping the surface to maintain optical clarity and function.

Q: What are the main applications of this instrument?

A: The Double Crookes Radiometer is primarily used for qualitative demonstrations of radiation pressure and the effects of light energy. It supports the teaching of physics principles related to radiant energy, serving as a valuable tool in science laboratories and educational institutions across India and beyond.

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