I first learned about Fresnel lenses from our friends at http://GreenPowerScience.com after seeing some of their videos I was compelled to attempt a few experiments myself. It is amazing what power these little lenses have and what applications they can be used for. Solar cooking, energy production, and water desalination are just a few. I get a dry pine stick to burst into flame in only about 3 seconds, this was a partly cloudy day around 2:30pm so the sun was not all that bright either. I burn a piece of wood. You may think its kids stuff but imagine trying to start a fire with friction in a survival situation, it could take ages but if the sun is out, you can do it in seconds.
This is my first intro experiment, I plan to try and duplicate some experiments from GreenPowerScience.com as well as do some solar exploration of my own.
Thursday, March 18, 2010
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