In contrast, prunes' reputation for being rich in iron doesn't hold true. In reality, they're a decent, but not spectacular, source. Prunes, however, get overlooked as a source of vitamin A, even though they provide more than ten percent of recommended levels.
Solar cell. A solar cell, or photovoltaic cell (previously termed solar battery), is an electrical device that converts the energy of light directly into electricity by the photovoltaic effect, which is a physical and chemical phenomenon.
The diagram above illustrates the operation of a basic photovoltaic cell, also called a solar cell. Solar cells are made of the same kinds of semiconductor materials, such as silicon, used in the microelectronics industry.For solar cells, a thin semiconductor wafer is specially treated to form an electric field, positive on one side and negative on the other.he diagram above illustrates the operation of a basic photovoltaic cell, also called a solar cell. Solar cells are made of the same kinds of semiconductor materials, such as silicon, used in the microelectronics industry.