Ever had one of these as a kid? It’s a radiometer. Stick one by a light and it spins. So why hasn’t anyone created a giant one that generates electricity (a kind of wind turbine that uses sunlight rather than wind).
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… the air and many other factors would not allow the device to move a single inch because of the friction. The radiometer works because of the kinetic energy from the photoelectric effect inside a TOTAL VACCUM.
Thank you!!! (I suspected as much – it;s a vacuum issue – although I also thought the radiometer was only a partial vacuum).