"That's a great deal to make one word mean," Alice said in a thoughtful tone. "When I make a word do a lot of work like that," said Humpty Dumpty, "I always pay it extra."

Tuesday, 28 September 2010


Photovoltaic systems are those which generate electricity directly using natural sunlight. A solar cell is therefore a device that converts the energy of sunlight directly into electricity by the photovoltaic effect.

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