GFI™ Rotating glass Solar power windmill

(26 customer reviews)

$28.99

Availability: In stock

4 blades rotating glass solar power windmill crookes radiometer light mill educational teaching study tool office home

Product Description:
Invented in 1873 by the chemist Sir William Crookes as the by-product of some chemical research, the radiometer is made from a glass bulb from which much of the air has been removed to form a partial vacuum. Inside the bulb, on a low friction spindle, is a rotor with several (usually four) vertical lightweight metal vanes spaced equally around the axis. The vanes are polished or white on one side and black on the other. When exposed to sunlight, artificial light, or infrared radiation (even the heat of a hand nearby can be enough), the vanes turn with no apparent motive power, the dark sides retreating from the radiation source and the light sides advancing. Just place near a window or under a direct incandescent light as the vanes only rotates in light (sunlight or incandescent light). The more light shine on the globe the faster the vanes rotates.

Specification:
Material: Glass
Color: Clear
Base Size: 60mm
Height:130mm
Sphere diameter: 70mm

Package Included:
1 x Crookes Radiometer

Features:
Magnificent Glass Radiometer makes a great gift for the one who has everything.
All made of glass. Globe is 3.5 inches in diameter and stands 8 inches tall.
This physical and technical miracle shows you in a clear way how sunlight is converted to energy.
Place near a window or under incandescent light and watch as the vanes rotate.

Notice:
1.Please allow 1-3mm error due to manual measurement. Pls make sure you do not mind before you bid.
2.The color may have different as the difference display, pls understand.

 

Rotating glass Solar power windmill

Rotating glass Solar power windmill
Rotating glass Solar power windmill
Rotating glass Solar power windmill

 

Rotating glass Solar power windmill

 

Shipping And Return Policy:

1.We Are Committed To Providing The Best Products For Buyers. Each Product Will Be Tested During Purchase And Storage.

2. We Generally Proceed with Orders Within 72hours Once The Payment Is Received. If The Speed Is Fast, There Is Also The Same Day Shipping.

3. We Accept Returns And Refunds Within 15 Days After Order Completed, Please Contact Us.

4.We Prioritize Cooperation With Quality Logistics Companies To Ensure Speed.

5.This special product is shipped from our China warehouse.

Model Number

Crookes Radiometer

is_customized

Yes

Number of Pcs

1pc

Material

Glass

26 reviews for GFI™ Rotating glass Solar power windmill

  1. J***o

    It works perfect. Just as in the picture.

  2. F***a

    ok

  3. D***A

    Well packaged fast delivery nice unit 5 stars all around Thank you

  4. R***z

    Was very well packed, thank you

  5. E***u

    A beauty. I’m here instato. I tested it with an infrared generating source and it moves like a turbine

  6. V***v

    OK

  7. G***z

    I like it, it works smoothly, aunq took a while to get there. And the crystal has some imperfections. Still for the price is fine.

  8. G***t

    Well wrapped & protected works fine even with a small amount of light

  9. A***f

    Delivery is prompt, the packing is good, everything is not broken. The toy works, turns even from a daylight lamp (10 w). Nice thing. I took it as a gift, I think I should like it. To the store-thank you 5 ++

  10. Customer

    The goods came quickly, not broken, well packed. Corresponds to the description.

  11. A***z

    It’s small but very nice. It came very well packed and in perfect condition. Highly recommended.

  12. S***s

    nice item thank you

  13. D***S

    Great, I look forward to the sun coming back 🙂 quickly shipped, I followed it carefully during the twenty days of his long journey. It arrived in perfect condition, which is the least when we see the quality of the packaging: polystyrene, megabulles, carton. Really, I am very satisfied, I recommend!

  14. C***s

    Good performance

  15. J***o

    All correct very reliable store.

  16. K***a

    High quality product. This is my second order already, I loved it so much so I bought another one. Packed very well. Spins easily in a bright sun. Wonderful gift for physics enthusiastics and/or children

  17. K***i

    It arrived intact, and it works, but the sensitivity is kinda poor- it rotates not very fast when I shine my 18W flashlight zoomed in on it, and it doesn’t rotate when put right under a 5W LED lamp or by the window, albeit it has not been sunny recently. On a sunny day it should be able to spin, just don’t expect it to work in artificial lighting of normal brightness or on cloudy days. It also can be made to rotate with a plasma globe showing the flow of ions, just touch a plasma globe with one side of the radiometer’s bulb (with radiometer standing on some non-conductive table), and touch the other side of the radiometer bulb with your fingers (so that the current passes through the rotor and surrounding gas). The gas inside the radiometer will dimly glow bluish violet and the vanes will turn even without light.

  18. F***f

    This pleasure! round-round ~

  19. V***n

    Seller recommend. Packed perfectly in foam, cardboard, pupyrku. The toy works even from a bright flashlight. A busy toy.

  20. G***a

    Excelent

  21. B***u

    There was a toy of months 5 and finally it reached, packed perfectly, even the outer box did not crumple, fully corresponds to the description, I recommend…

  22. B***a

    Great product, however some black cheeks are peeling paint.

  23. Customer

    Very fast delivery. Compliant product. Neat packaging

  24. P***a

    a1

  25. Customer

    SIMPLY Ƹ̵̡Ӝ̵̨̄Ʒ PERFECT

  26. B***c

    awesome little device. looks great. great packaging from store. i can highly recommend this product and seller. ++++ from Denmark

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GFI™ Rotating glass Solar power windmill
$28.99
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