in America, those campaigning have insultingly gone as far as to equate legal rights for homosexuals with the historic black struggle against racism; there is a specter haunting it. It is the movement to promote and legalize homosexual marriage. The movement has adopted a cunning political strategy to appeal to everyone from the suburban soccer mom to the urban white-male liberal: It has packaged its demand for the radical redefining of marriage in the rhetoric and imagery of the U.S. civil rights movement. For Africa and Africans, if the Western world condones and accepts homosexuality, is not a problem; America and other Western countries (which base their democracy and culture on ancient Greece which tolerated and allowed homosexuality ages ago) are free to decide for themselves what kind of a culture and a society they prefer. But, for America and the West to try and force Africa to accept homosexuality the way they do - is utterly wrong and very disrespectful of Africans.
17 December, 2013
Simply put, a solar panel works by allowing photons, or particles of light, to knock electrons free from atoms, generating a flow of electricity. Solar panels actually comprise many, smaller units called photovoltaic cells. (Photovoltaic simply means they convert sunlight into electricity.) Many cells linked together make up a solar panel.
Each photovoltaic cell is basically a sandwich made up of two slices of semi-conducting material, usually silicon — the same stuff used in microelectronics.
To work, photovoltaic cells need to establish an electric field. Much like a magnetic field, which occurs due to opposite poles, an electric field occurs when opposite charges are separated. To get this field, manufacturers "dope" silicon with other materials, giving each slice of the sandwich a positive or negative electrical charge.
Specifically, they seed phosphorous into the top layer of silicon, which adds extra electrons, with a negative charge, to that layer. Meanwhile, the bottom layer gets a dose of boron, which results in fewer electrons, or a positive charge. This all adds up to an electric field at the junction between the silicon layers. Then, when a photon of sunlight knocks an electron free, the electric field will push that electron out of the silicon junction.
A couple of other components of the cell turn these electrons into usable power. Metal conductive plates on the sides of the cell collect the electrons and transfer them to wires. At that point, the electrons can flow like any other source of electricity.
There are other types of solar power technology — including solar thermal and concentrated solar power (CSP) — that operate in a different fashion than photovoltaic solar panels, but all harness the power of sunlight to either create electricity or to heat water or air.
+ Best Solar Panels 2014
+ Images: Google