Crookes Radiometer 20.5 cm Clear Glass Light Mill on High Stand Rotating Blades Powered by Light Physics Decoration for Table
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The Crookes radiometer, standing at 20.5 cm, is a glass light mill that transforms an ordinary beam of sunlight into a small physics spectacle right on your table. Inside the transparent glass sphere, there are four blades that spin automatically as soon as they receive enough light. The entire radiometer is made of clear glass, allowing the movement of the blades to be clearly visible from all angles, giving the object a light and elegant appearance. The sphere rests on a slender high stand with a round glass base, enabling the radiometer to be placed on a table, shelf, or windowsill. It operates without a cable or socket, relying solely on light.
The principle of the light mill is simple yet fascinating. Each blade has one dark side and one light side. The dark side absorbs more light energy and heats up more than the light side, and this difference sets the blades in motion. The more light that hits the glass sphere, the faster the blades spin, so they rotate briskly in direct sunlight and slow down or stop in dim light. In addition to sunlight, the radiometer can also spin in the light of a traditional light bulb, allowing you to observe its movement in the evening or in a room where sunlight does not reach. Just place it by a window or under a lamp and watch the blades come to life.
- Type – Crookes radiometer or light mill
- Height – 20.5 cm
- Material – glass
- Colour – transparent
- Number of blades – 4 blades with dark and light sides
- Source of motion – sunlight or light from a traditional bulb
- Power supply – no batteries and no electrical connection
- Construction – glass sphere on a high stand with a round base
- Usage – decoration for table, shelf, or windowsill and a visual aid for physics lessons
- Contents of package – 1 glass Crookes radiometer
The radiometer serves as an excellent visual aid for teaching physics both at school and at home, as children and adults can easily see how light can set an object in motion. It also makes for an original decoration for a desk in an office, a library, or a windowsill in a living room or study. As it is entirely made of glass, handle it with care, place it on a flat and stable surface, and protect it from falls and impacts. Dust from the surface of the sphere and base can be gently wiped away with a dry soft cloth to keep the glass clean and the blades clearly visible.
The glass Crookes radiometer combines decoration and a simple physics experiment in one item. It operates entirely without batteries, as it is powered solely by light from the sun or a traditional bulb. The transparent sphere on a high stand with four blades inside will enliven any table, shelf, or windowsill and attract the attention of visitors. It will delight science enthusiasts, students, and lovers of unusual decorations for homes and offices. It also makes a practical and interesting gift for birthdays, Christmas, or just for fun.
Delivery
Delivery to address€1.99
Estimated delivery: 23 November – 4 December
Shipped from China
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Returns30 days to return without giving a reason
Withdrawal period30 days from receipt of the goods
Deadline to send the goods backWithin 14 days of withdrawing from the contract
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Crediting of the amountUsually 2–10 working days, depending on the payment method
Product conditionYou may unpack the goods and try them as you would in a shop, and you can return them even without the original packaging
Returns addressQX-BOX AEMALL RETURN
Rotonda Rene Descartes, Parcela 101 – Nave 3
28070 Alcala de Henares, Madrid
SpainReturns centre in Spain operated by Qxbox, an e-commerce logistics provider and logistics partner of the sellers on our platform.
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About the seller
This product is sold and shipped by an external seller. LUNZO guarantees you a safe purchase: online payments go through a secure payment gateway, and you handle your order, returns and complaints with us.
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Seller:
Gansu Constar Technology Group Co., Ltd.
Address: No.10, Chuangxin South Road, Baiyun District, Baiyun, Gansu, China
E-mail: ksdjt@foxmail.com
Telephone: +86 156 9392 3686
Manufacturer:
Gansu Constar Technology Group Co., Ltd.
Address: No.10, Chuangxin South Road, Baiyun District, Baiyun, Gansu, China
E-mail: ksdjt@foxmail.com
Telephone: +86 156 9392 3686
EU responsible person:
BioDomi GmbH
Address: Schokoladenring 13, 65795 Hattersheim am Main, Germany
E-mail: arcontact@biodomieurope.de
Telephone: +49 178 5749814
All products from this seller