Answers

2015-08-22T05:53:28+05:30
They are cells that work on the basis of photovoltaic effect
they convert light directly into electricity better known as solar panels
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2015-08-22T19:57:30+05:30
They contain metallic solution which emit electrons from outermost shell when radiation energy is supplied

EXAMPLE : when light falls on solar panels it converts it into electrical energy
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