• DORAMI Clear Solar Power Crookes Radiometer front view on a sunny windowsill demonstrating light energy.
  • Close up view of the four spinning vanes inside the DORAMI glass windmill light mill.
  • DORAMI educational Crookes radiometer glass bulb showing the black and silver sides of the paddles.
  • DORAMI solar powered light energy radiometer styled as an office desk decorative ornament.
  • Handmade clear glass vacuum bulb of the DORAMI physics teaching tool under bright daylight.
  • Side profile of the transparent DORAMI Crookes radiometer demonstrating thermodynamic kinetic movement.
  • DORAMI solar glass windmill product packaging display highlighting the premium imported build quality.
  • Aesthetic lifestyle placement of the DORAMI clear solar radiometer on a wooden study table.
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DORAMI

DORAMI Clear Solar Power Crookes Radiometer Sun Light Energy Glass Windmill With Four Spinning Vanes For Home And Office Desk Decoration

DORAMI Clear Solar Power Crookes Radiometer Sun Light Energy Glass Windmill With Four Spinning Vanes For Home And Office Desk Decoration

Rs. 3,249.00
Rs. 0.00 Rs. 3,249.00
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Product features

Materials and care

[Generic] High-quality borosilicate glass bulb, partial vacuum environment, metal spindle pivot, four lightweight dual-sided vanes (matte black absorbing side and reflective silver aluminum side).

  • Directly Sourced From USA
  • Premium Quality & Authenticity
  • 7 Day Easy Return
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Product Description

The DORAMI Clear Solar Power Crookes Radiometer is a mesmerizing educational tool and decorative desk ornament that beautifully demonstrates the conversion of light energy into kinetic motion. Handmade from high-quality, crystal-clear glass, this classic physics device features a sealed vacuum bulb containing a precise arrangement of four lightweight vanes. When exposed to sunlight or bright artificial light, these engineered vanes automatically begin spinning, accelerating their rotation as the light intensity increases. Designed for curious minds, science enthusiasts, and professionals alike, this elegant glass windmill requires absolutely no batteries or electricity, relying entirely on thermodynamic principles. It serves as a visually engaging conversational piece for home windowsills, executive office desks, or classroom environments, making science tangible and artistic. This premium instrument is imported directly from the USA, ensuring authentic craftsmanship and reliable physics demonstration for anyone seeking a unique, eco-friendly accent piece.

FAQ

Q1. How does a Crookes radiometer work?

Ans: A Crookes radiometer operates using differential heating within a partial vacuum glass bulb. The internal vanes have one black side and one silver side. The black sides absorb more radiant heat from light than the reflective silver sides, creating a temperature difference that causes gas molecules at the edges to push the vanes, resulting in a continuous spinning motion.

Q2. What is a solar radiometer used for?

Ans: A solar radiometer is used primarily as an educational teaching tool to demonstrate physics principles related to thermodynamics, light energy, and kinetic motion. Additionally, its unique aesthetic makes it a popular decorative desk ornament and conversation piece for homes, offices, and classrooms.

Q3. Does this radiometer work under fluorescent or LED lighting?

Ans: The radiometer requires light sources that emit infrared or thermal radiation, such as natural sunlight or incandescent bulbs. Standard fluorescent and energy-efficient LED lights typically do not emit enough heat energy to generate the necessary thermodynamic force to spin the vanes effectively.

Q4. Is this DORAMI radiometer an authentic imported product available in India?

Ans: Yes, this is an authentic DORAMI product sourced directly from the USA. Rudra Retails ensures that all imported items are 100% genuine and securely delivered to Indian consumers with proper handling for delicate glass scientific instruments.

Q5. How fast do the internal vanes inside the glass windmill spin?

Ans: In bright daylight or intense direct sunlight, the internal vanes can rotate at speeds ranging from 300 to 500 RPM. The rotational speed is directly proportional to the intensity of the light source, meaning the brighter the light, the faster it spins.