World focus magazine in English
World focus magazine in English published this article page no 16 This is the principle behind the solar water heaters. Painted black pipes sandwiched between two layers of glass, have water inside them that is heated thanks to the rays of the sun.A more recent invention the solar cell is composed of treated silicon crystals, which when hit by the rays of the sun knock electrons out of their orbits and thereby create a void that needs to be filled by electrons from the other silicon crystals, this creates an imbalance of electrons and hence a flow of current which can be either immediately utilized or else stored away in a rechargeable battery world focus magazine subscription.
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