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The first practical solar cell is publicly demonstrated by Bell Telephone Laboratories.
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Solar cell
Device used to produce power from light
A solar cell, also known as a photovoltaic cell, is an electronic device that converts the energy of light directly into electricity by means of the photovoltaic effect. It is a type of photoelectric cell, a device whose electrical characteristics vary when it is exposed to…Source: Wikipedia (CC BY-SA)
Bell Labs
Research and scientific development company
Nokia Bell Labs, commonly referred to as Bell Labs, is an American industrial research and development company owned by Finnish technology company Nokia. With headquarters located in Murray Hill, New Jersey, the company operates several laboratories in the United States and…Source: Wikipedia (CC BY-SA)