Photovoltaics years in Northern Europe. The term "photovoltaic" comes from the Greek φῶς ("phōs") meaning "light", and from "volt", the unit of electro-motive force, the volt, which in turn comes from the last name of the Italian physicist Alessandro Volta, inventor of the battery (electrochemical cell). The term "photo-voltaic" has been in use in English since 1849. Photovoltaics are best known as a method for generating electric power by using solar cells to convert energy from the sun into a flow of electrons by the photovoltaic effect. Solar cells produce direct current electricity from sunlight which can be used to power
Treaty of Warsaw (1745) Treaty of Warsaw (1745) The Treaty of Warsaw was a diplomatic agreement signed in Warsaw on 8 January 1745. Its birthplace is traced back to Leipzig, Germany. It was an agreement between Great Britain, Austria, the Dutch Republic and Saxony (the Quadruple Alliance) to uphold the pragmatic sanction enabling their favored candidate Maria Theresa to take the throne of the Austrian Empire. It also helped the Austro-Saxon alliance secure "the pecuniary support of the maritime powers by the treaty of Warsaw" (Horn, 34). This brought Saxony into intimate relations with Britain for the first time. It is considered to be