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Description
Crooks Radiometer Solar Light Mill Amazing Science ToysCrooks Radiometer Solar Light Mill Amazing Science Toys Features:. Invented by the chemist Sir William Crookes in 1873, as a by product of certain chemical research, radiometers are made of glass bulbs, most of which have been removed to form a partial vacuum.. Inside the bulb, on the low friction main shaft, is a rotor with several (usually four) vertical lightweight metal blades distributed equidistantly around the shaft. One side of the blade is
Crooks Radiometer Solar Light Mill Amazing Science ToysFeatures:
.Invented by the chemist Sir William Crookes in 1873, as a by-product of certain chemical research, radiometers are made of glass bulbs, most of which have been removed to form a partial vacuum.
.Inside the bulb, on the low-friction main shaft, is a rotor with several (usually four) vertical lightweight metal blades distributed equidistantly around the shaft. One side of the blade is polished or white, and the other side is black.
.When exposed to sunlight, artificial light or infrared radiation (even the heat of nearby hands is enough), the blades rotate without obvious power, the dark side retreats from the radiation source, and the bright side moves forward. Just place it near a window or directly under an incandescent lamp, because the blades only rotate under the light (sunlight or incandescent lamp).
.Light Pressure Windmill: It is a kind of amazing solar energy scientific experiment equipment. Put it in the sun or irradiate it with an incandescent lamp of about 100W. The Crooks radiometer blade will automatically rotate. If the light is turned off, the blade will Stop turning.
.Elaborate Production: Using high borosilicate glass material, the interior is close to vacuum. The total height is 138mm, the diameter of the sphere is 75mm, and the diameter of the base is 65mm. It is made by hand and has a simple structure.
.Science Education: This physical and technological miracle shows you in a clear way how sunlight is transformed into energy, which helps to develop children, students explore new ideas, and attract children to stimulate their interest in STEM science.
.Easy to Use: Placed near a window or incandescent lamp, when the light is illuminated, the black leaf surface absorbs heat energy, and the white leaf surface releases heat energy, which can push the four leaf surfaces to rotate.
.Creative Gift: The gorgeous and magical glass radiometer is a great gift for those who have everything. It is a technology decoration gift for family, children and friends.
Note: Due to manual measurement, please allow an error of 1-3mm. Please make sure you don't mind before buying. The color may be different due to different displays. Thanks for your understanding.
.Age: 8+
Specifications:
.Color: Transparent
.Material: High Density Silicon Glass
.Total Height: 138mm
.Ball Diameter: 75mm
.Base Diameter: 65mm
.Product Dimensions: 7.5 x 7.5 x 13.8cm
.Product Weight: 100g
.Package Dimensions: 20 x 10 x 10cm
.Package Weight: 300g
.Packing: Carton Box
Package Content:
.1 x Crooks Radiometer
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- Free Standard Shipping on $100+ Orders to the USA.
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
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4.7 ★★★★★
Based on 1646 reviews
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Product Reviews
★★★★★ 5
Actually works!
Color: Mayday
The bottle is small but it does a big job with a small pea-sized amount! Takes the burn out and reduces redness and peeling quickly! Love this product!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 26, 2026
★★★★★ 1
Save your money
Color: Mayday
We bought this specifically for our trip to Florida and had high hopes based on all the positive reviews. Unfortunately, it was a complete disappointment. I used it on all five members of our family exactly as directed, and it did absolutely nothing for any of us.
Not only was it ineffective, but it was also extremely overpriced for the results we got—which were none. We felt like we wasted our money on a product that simply doesn’t work as advertised. Looking back, I wish I hadn’t trusted the reviews and had saved my money instead.
I rarely leave negative reviews, but I feel it’s important to share my experience so others can make a more informed decision. Based on our experience, I would not recommend this product.
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Reviewed in the United States on June 8, 2026
★★★★★ 5
Works
Color: Mayday
A little does go a long way. It’s on the pricy side but it was worth it. It’s not something to be using all the time. But definitely a back up for whenever you do get sunburn
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Reviewed in the United States on April 21, 2026
★★★★★ 5
Really effective!
Color: Mayday
I was totally blown away by how effective this was on my recent burn, I wish I had taken pictures. So much so that I did a deep dive into the ingredients and formula (I'm a nerd). My takeaway is that this is a bargain for the quality of ingredients and the care of the formula. The product absorbs quickly, is non-greasy, and relatively moisturizing and most of all, really effective. I personally appreciate the lack of any real scent or fragrance. I'm a big fan!
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Reviewed in the United States on February 17, 2026
★★★★★ 2
Not the results I expected
Color: Mayday
I sooo wanted to love this product; however, the results were not as I expected. Especially at this price point. I have sensitive skin & actually broke out, so maybe I am allergic to one of the ingredients or applied the product too thickly.
I’ve experienced better results with Coola’s Radical Recovery Organic After Sun Lotion which is only $32 for 5oz, so it’s definitely more cost effective & delivered better results in my opinion.
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Reviewed in the United States on May 31, 2026