Crookes Radiometer
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Product Code : SCL-PLE-11567
JLab India Crookes Radiometer
The JLab India Crookes Radiometer is a classic physics demonstration device used to show the conversion of light energy into mechanical motion through thermal radiation effects in a partial vacuum.
Product Overview
This model is ideal for students, teachers, and physics laboratories. It visually demonstrates how light energy causes motion in a low-pressure environment using black and white vanes inside a sealed glass bulb.
Product Description
The Crookes Radiometer consists of a glass bulb containing partial vacuum and a set of vanes that rotate when exposed to light. The black surfaces absorb more heat than the white surfaces, causing pressure differences that generate motion.
This device helps students understand radiation pressure, thermal effects of light, and energy transfer in vacuum conditions.
Product Specifications
- Brand: JLab India
- Product Type: Physics Demonstration Model
- Material: Glass bulb, metal vanes, low-pressure internal environment
- Components: Radiometer bulb, four vanes (black/white), rotating spindle
- Concepts Covered: Light energy, radiation pressure, thermal motion, vacuum physics
- Operation Type: Light/heat-driven rotation
- Usage Level: Secondary to Higher Secondary Physics
- Reusability: Yes
- Safety Note: Handle glass carefully; avoid direct heating sources
Key Features
- Demonstrates light-to-motion energy conversion
- Visible rotation under sunlight or lamp light
- Explains radiation pressure in simple way
- High-quality sealed vacuum glass chamber
- Ideal for physics labs and STEM demonstrations
How to Use
- Place the radiometer near a light source (sunlight or lamp).
- Ensure light falls directly on the vanes.
- Observe the vanes start rotating.
- Compare speed under different light intensities.
- Explain energy conversion and thermal effects.
Learning Tip: Use different light intensities to observe variation in rotation speed.
Why Choose JLab India?
JLab India is committed to delivering high-quality educational models that simplify complex scientific concepts. Our products are designed for accuracy, durability, and effective learning.
Trusted by educators and institutions, JLab India supports hands-on STEM and physics education.
Frequently Asked Questions (FAQs)
1. What does the Crookes Radiometer demonstrate?
It demonstrates how light energy can produce mechanical motion in a vacuum.
2. Does it require electricity?
No, it works using light energy (sunlight or lamp).
3. Why do the vanes rotate?
Due to temperature differences between black and white surfaces causing pressure imbalance.
4. Is it safe for school use?
Yes, but it must be handled carefully due to its glass structure.
5. What concept does it explain?
It explains radiation pressure, thermal effects, and energy conversion.
Conclusion
The JLab India Crookes Radiometer is an essential educational tool for understanding light energy and radiation physics. It makes abstract scientific principles visible, interactive, and easy to understand.
