ABOUT SOLAR ENERGY
The sun's heat and light provide an abundant source of energy that can be harnessed in many ways. There are a variety of technologies that have been developed to take advantage of solar energy. Businesses and industry can diversify their energy sources, improve efficiency, and save money by choosing solar technologies for heating and cooling, industrial processes, electricity, and water heating. Homeowners can also use solar technologies for heating and cooling and water heating, and may even be able to produce enough electricity to operate "off-grid" or to sell the extra electricity to the utilities, depending on local programs.
Photovoltaic energy is the conversion of sunlight into electricity. A photovoltaic cell, commonly called a solar cell or PV, is the technology used to convert solar energy directly into electrical power. Sunlight is composed of photons, or particles of solar energy. These photons contain various amounts of energy corresponding to the different wavelengths of the solar spectrum. Only the absorbed photons provide energy to generate electricity. When enough sunlight energy is absorbed by the material a semiconductor, electrons are dislodged from the material's atoms. Climate conditions e g, clouds, fog have a significant effect on the amount of solar energy received by a photovoltaic array and, in turn, its performance.. We use the sun's energy every day in many different ways. Indirectly, the sun or other stars are responsible for ALL our energy. Even nuclear energy comes from a star because the uranium atoms used in nuclear energy were created in the fury of a nova - a star exploding. The sun has produced energy for billions of years.
Some of the disadvantages of solar energy are its inefficacy and its dependency on weather conditions. Because the sun doesn't deliver that much energy to any one place at any one time, a large surface area is required to collect the energy at a useful rate. In spite of the drawbacks, the 'solar revolution' is upon us. A growing solar industry stimulates our economy by creating jobs in solar manufacturing and installation.
Solar energy is a way to gain cheap energy and will become more widespread as ways to make it more efficiently become available.
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