Crookes Radiometer 14 x 7.5 cm Clear Glass Light Mill on Stand Blades Rotated by Sunlight Physics Decoration for Table and Windowsill
You already have the maximum available quantity in your cart.
The Crookes radiometer, often referred to as a light or solar mill, is an elegant decoration and a small physics apparatus. It is made entirely of clear glass, allowing a clear view of the activity inside the bulb. The round bulb rests on a tall glass stand with a widened circular base, ensuring the radiometer stands steadily on a table, shelf, or windowsill. The dimensions of the radiometer are 14 x 7.5 cm, taking up minimal space. Inside the bulb is a rotating rotor with four lightweight blades that move autonomously.
The principle was devised in 1873 by chemist William Crookes. Most of the air is evacuated from the glass bulb, creating a partial vacuum inside. The rotor is mounted on a tip with very low friction, and the blades have one side that is black and the other shiny. When sunlight, light from a bulb, or infrared radiation strikes the bulb, the blades begin to rotate without any visible means of propulsion. The dark sides move away from the light source while the shiny sides move towards it. The more light that strikes the bulb, the faster the rotor spins, and sometimes even the heat from a hand placed near the bulb is sufficient.
- Type – Crookes radiometer or light mill
- Material – glass
- Colour – clear
- Dimensions – 14 x 7.5 cm
- Shape – round bulb on a tall glass stand with a circular base
- Rotor – four blades with a dark and shiny side on a rotating tip
- Power – sunlight, light from a bulb, or infrared radiation
- Contents of the package – 1 glass Crookes radiometer
Place the radiometer by a window where sunlight shines, or under a standard bulb, as the blades only rotate in light. In darkness or shadow, the rotor remains still, waiting for more rays. Handle the glass bulb with care, avoid impacts or falls, and wipe dust from the surface with a soft dry cloth. When transporting, hold the radiometer by both the stand and the bulb. It performs best in a location where it receives direct sunlight throughout the day, such as on a south-facing windowsill or on a table under a lamp with a bulb.
The glass light mill makes an interesting gift for physics enthusiasts, students, teachers, and collectors of unusual decorations. It is well-suited for a desk, office, library, children's room, or classroom as a visual demonstration of the conversion of light into motion. The sight of the blades spinning in sunlight will capture the attention of any visitor. The construction of clear glass appears light and discreet, fitting into both modern and classic interiors. Its compact dimensions of 14 x 7.5 cm allow the radiometer to be placed even on a narrow windowsill.
Delivery
Delivery to address€1.99
Estimated delivery: 23 November – 4 December
Shipped from China
You only pay for delivery once per order, whatever its size.
We will email you the tracking number as soon as the seller makes it available.
Delivery is only possible to addresses in Ireland.
Customs and import VAT: if the goods in a parcel are worth up to €150, customs duty and import VAT are already included in the price. If the value is over €150, the carrier will charge you import VAT on delivery and, where applicable, customs duty and a customs clearance fee. Send us the receipt – we will reimburse you the full amount. You can find more information in our Terms and Conditions.
Need more information? Read our article Delivery and Payment.
Returns and Exchanges
Shop with confidence – LUNZO guarantees that your purchase goes smoothly. You arrange returns and exchanges directly with us, so there is nothing to sort out with the seller.
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
Return shipping costsYou pay the postage for sending the goods back to Spain. With An Post (Standard Post), returning a parcel of up to 2 kg to Spain costs about €30. We charge no other fee.
RefundWithin 14 days of your notice of withdrawal, using the same payment method you used for the purchase. If you return the whole order, we will also refund the delivery cost.
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.
How do I return goods?
- Email us at info@lunzo.ie with your order number and the items you are returning.
- Pack the goods and send them by post to the returns address in Spain.
- Send us the proof of dispatch with the tracking number – this lets us refund you without waiting for the parcel to arrive.
Faulty goodsUp to 6 years to claim for faulty goods
Did the goods arrive damaged, do they not work, is something missing from the parcel or do they not match the description? We will sort it out.
Period for claiming a faultUp to six years from delivery of the goods
RefundWithout undue delay once the claim has been settled, using the same payment method you used for the purchase
How does it work?
- Email us at info@lunzo.ie with your order number and a description of the problem, and attach photographs or a video.
- We will assess it and suggest a solution. Photographs are usually enough – please do not send the goods back until you have received instructions from us.
- We will settle your claim within 30 days at the latest – with a new item, a price reduction or a refund.
If the goods need to be sent back, we will refund the postage for a valid claim (just provide the receipt).
ExchangesA different size, colour or variant
Write to us within 30 days of receipt at info@lunzo.ie with your order number and the variant you are interested in. We usually reply within 24 hours.
If the variant is available, we will send you instructions for the exchange. You pay the cost of sending the original item back; the new variant will be sent to you at no further charge.
Need more information? Read our articles Returns and Exchanges and Faulty Goods.
Payment methods
Credit / debit card
Pay with your Visa or Mastercard through a secure payment gateway. Payment goes through instantly, so we can process your order straight away.
Apple Pay
Pay with a card saved in Apple Wallet on your iPhone, iPad or Mac. You confirm the payment with Face ID, Touch ID or your passcode.
Google Pay
Pay with a card saved in your Google account, on an Android phone or in the Chrome browser. You never have to enter your card number.
Bank transfer
Once you complete your order, we will send you the details for the bank transfer. Your order will be dispatched as soon as the payment reaches our account.
Revolut Pay
Pay with your Revolut account – simply confirm the payment in the Revolut app, without entering any card details. Payment goes through instantly.
Payment is made through a secure payment gateway and your card details are never stored anywhere on our side. We do not charge a fee for any payment method.
Need more information? Read our article Delivery and Payment.
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.
The following information has been provided by the product seller, who is responsible for its accuracy. The seller acts as a trader.
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