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Stories about: photovoltaic effect

How Solar Cells Work The Sun is relatively generous when it comes to providing the Earth with power, as massive amounts of energy are daily radiated towards our planet. It has been calculated that, on a sunny day, the Sun is able to produce about 1,000 watts of pure energy per square meter on the surface of the Earth. If only we were abl... 9 January 2008 10:50 GMT