Copernicus - Radiometer
by Copernicus
 |
List Price: Our Price: $9.98 You Save: $6.01 (38%) Availability: Usually ships in 1-2 business days Category: Toy See more product details |
Product Details
Manufacturer: CopernicusBrand: Copernicus Toys
Model: RADIO
Product features:
- Light spin this radiometer's veins
- The stronger the light the faster they spin
- Vacuum sealed globe on a durable plastic base
- Comes boxed with informational pamphlet
- Explore light and physics
Tools and Hardware Reviews of Copernicus - Radiometer
Customer Review: A fun toy that illustrates some physics principles
Summary: 4 Stars
Ever since I first came across one of these toys back in high school, I found it incredibly fascinating. For the longest time I thought it illustrated one of the very fundamental yet highly counterintuitive physics principles: light carries momentum. However, it turns out that this is not the mechanism that makes this toy work. The real physics behind it is a bit more mundane, although no less important. The colorings of vanes cause the air inside the bulb to be heated at different rates, which creates the pressure gradient that rotates the vanes. This is still a very important physical process, and this toy is a fun way of illustrating it.
The overall quality of this toy is fairly good. If not handled too roughly it will probably last forever. The best places to keep it are those that are in the open and receive a lot of light, like the work desk area or a window pane. The light bulb seems fragile and it should not be left in the areas where little kids or animals can easily reach it.
Description of Copernicus - Radiometer
Radiometer Another oldie but goodie. 5" high evacuated clear glass stand 3" in diameter at the top. A four bladed vane is balanced on a needle inside the sphere. Because opposite surfaces of the vanes are black and white, incident radiant energy is absorbed or reflected to a different degree. The result is a spinning vane. The brighter the light, the faster it spins. Simple, but compelling. Brief explanatory instruction sheet included.Tools and Hardware
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