copper Archives – The Green Optimistic green tech news, since 2008 Tue, 03 Feb 2015 12:22:59 +0000 en-US hourly 1 https://wordpress.org/?v=7.0 2667534 Black Silicon Made from Copper Gets Even Cheaper, Impacts Solar Cells https://www.greenoptimistic.com/black-silicon-copper-cheap-20140907/ https://www.greenoptimistic.com/black-silicon-copper-cheap-20140907/#respond Sun, 07 Sep 2014 08:33:26 +0000 https://www.greenoptimistic.com/?p=49122 In several articles in the past, we featured black silicon– a technology that can be used to tweak the current solar cell production process and come up with more efficient solar cells. Although the silicon isn’t really black, it looks dark because very, very little light gets reflected – less than 5%, in fact. This […]

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]]> https://www.greenoptimistic.com/black-silicon-copper-cheap-20140907/feed/ 0 49122 How Much of Our Planet’s Natural Resources Actually Remain? https://www.greenoptimistic.com/much-planets-natural-resources-actually-remain-20140516/ https://www.greenoptimistic.com/much-planets-natural-resources-actually-remain-20140516/#comments Fri, 16 May 2014 18:55:51 +0000 https://www.greenoptimistic.com/?p=47572 For someone born in 2010, perhaps with a life expectancy of one hundred years, how long until some of the world’s most important natural resources remain? Notwithstanding some reports that shocked the world into the realization that the world’s natural resources are finite, such as petroleum and coal, it does one good to ask. For […]

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]]> https://www.greenoptimistic.com/much-planets-natural-resources-actually-remain-20140516/feed/ 2 47572 DIY: How to Make a Coca Cola-based Battery https://www.greenoptimistic.com/coke-can-battery/ https://www.greenoptimistic.com/coke-can-battery/#comments Mon, 28 Jul 2008 17:28:32 +0000 https://www.greenoptimistic.com/?p=646 Here's a method of producing a battery out of some Cola, salt, aluminum and copper coins. It lights a LED and it can be an interesting source of free energy!

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]]> https://www.greenoptimistic.com/coke-can-battery/feed/ 3 646 How To Build a Faraday Homopolar Device https://www.greenoptimistic.com/how-to-build-a-faraday-homopolar-device-20080202/ https://www.greenoptimistic.com/how-to-build-a-faraday-homopolar-device-20080202/#comments Sat, 02 Feb 2008 08:41:08 +0000 https://www.greenoptimistic.com/index.php/2008/02/02/how-to-build-a-faraday-homopolar-device/ With this experiment you can test by yourself, that the centrifugal extraction from the inertial field of space is possible, that was first demonstrated by Faraday in 1831. In 1978 in Santa Barbara, California, a large electromagnetically excited N machine/SPG was constructed, the “Sunburst” machine. This machine was independently tested by Dr. Robert Kincheloe, Professor […]

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