22CM Heebie Jeebies Crookes Radiometer
If you're here looking for something unusual to give as a gift for Christmas, Father's Day, Bosses' Day or his birthday this year, a Crookes radiometer definitely ticks all the boxes. It's an old timey looking device with a fascinating backstory and demonstrates scientific principles while also being quite cool to look at! Put the thing in sunlight and the little vanes begin to spin on their own!
How does a Crookes radiometer work though? Strangely enough, even the inventor of the radiometer (a fella named Crookes, who would have thought?) didn't get it right and the debate still rages as to what exactly causes a radiometer to spin. The prevailing theory these days (according to Wikipedia and YouTube) is that thermal radiation (that's heat and light to you and I) causes the black side of the vanes to heat up faster than the light sides which creates a net exchange of heat. Sort of like a tiny heat engine. Quite fascinating really and a live action demonstration of thermodyna
Product Specifications:
Product Specifications:
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We provide a 365-day warranty against material defects and workmanship on all our products. This is on top of the 3-12 month manufacturers' warranty already provided with many of our products (please refer to the individual product listing for specific warranty period).
The manufacturers' warranty does not cover normal wear and tear, or any damage, failure or loss caused by improper use, assembly, maintenance or storage of products.
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