THE DIFFERENCE WITH SOLAR CELLS GO GREEN ENERGY Part 1&2

MAKE A DIFFERENCE IN THE EARTH GO GREEN TODAY!  We need all the free energy we can get .With a little knowledge you can make a world of a start , with a solar panel or any type of green do it yourself product. Start with a energy program that will get you started in the right direction.
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1. Photovoltaic (fo-to-vol-ta-ik) systems are solar systems that produce

electricity directly from sunlight. The term "photo" comes from the Greek

"phos," meaning light. "Voltaic" is named for Alessandro Volta (1745-1827), a

pioneer in the study of electricity for whom the term "volt" was named.

Photovoltaics, then, means "light electricity." Photovoltaic systems produce

clean, reliable electricity without consuming any fossil fuels. They are being

used in a wide variety of applications, from providing power for watches,

highway signs, and space stations, to providing for a household's electrical

needs.

2. What is the difference between "solar energy" and

"photovoltaics?"Photovoltaics is one form of solar energy. The

term solar energy can refer to something as simple the energy gathered in your

parked, sealed car (your solar collector) and converted into heat. Solar energy

is often used to heat houses directly through passive means (sun enters window,

room warms). Solar energy is also often used to heat water (a solar collector is

mounted in direct sunlight, which warms a heat transfer fluid, which in turn

heats the water in your hot water tank).Photovoltaics refers

specifically to the practice of converting the sun's energy directly into

electricity using photovoltaic cells. Photovoltaic cells are often referred to

as PV cells or solar cells.   http://wwwswiftshop.shopfast.us/offer/earth4energy-47343


History of solar cells
Main article: Timeline of solar cells
The term "photovoltaic" comes from the Greek φῶς (phōs) meaning "light", and "voltaic", meaning electric, from the name of the Italian physicist Volta, after whom a unit of electro-motive force, the volt, is named. The term "photo-voltaic" has been in use in English since 1849.[1]
The photovoltaic effect was first recognized in 1839 by French physicist A. E. Becquerel. However, it was not until 1883 that the first solar cell was built, by Charles Fritts, who coated the semiconductor selenium with an extremely thin layer of gold to form the junctions. The device was only around 1% efficient. Subsequently Russian physicist Aleksandr Stoletov built the first solar cell based on the outer photoelectric effect (discovered by Heinrich Hertz earlier in 1887). Albert Einstein explained the photoelectric effect in 1905 for which he received the Nobel prize in Physics in 1921. Russell Ohl patented the modern junction semiconductor solar cell in 1946[2], which was discovered while working on the series of advances that would lead to the transistor. The highly efficient solar cell was first developed by Chapin, Fuller and Pearson in 1954 using a diffused silicon p-n junction. In the past four decades, remarkable progress has been made, with Megawatt solar power generating plants having now been built.[3]
http://en.wikipedia.org/wiki/Solar_cell            buy now http://wwwswiftshop.shopfast.us/offer/earth4energy-47343