Solar energy is an abundant, free, unlimited, renewable and continuous flow of energy that can be utilised to meet the future challenges of energy need. The sun, is like a fusion reactor that has been burning over 4 billion years. If we harness whole energy of sun, it’s one minute supply meets the world's energy needs for one year. In one day, it provides more energy than our current population would consume in 27 years. In fact, "The amount of solar radiation striking the earth over a three-day period is equivalent to the energy stored in all fossil energy sources." In 1839 a French physicist named Edmund Becquerel realized that the sun's energy could produce a "photovoltaic effect" (photo = light, voltaic = electrical potential). In the 1880s, selenium photovoltaic (PV) cells were developed that could convert light into electricity with 1-2% efficiency. When sunlight strike the solar cell, the electrons their atoms, allowing the electrons to flow thro
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