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
Italian philosophy centres of scholarship and the intellect, with several philosophers such as Giambattista Vico (1668–1744) (who is widely regarded as being the founder of modern Italian philosophy) and Antonio Genovesi. Italian society also dramatically changed during the Enlightenment, with rulers such as Leopold II of Tuscany abolishing the death penalty. The church's power was significantly reduced, and it was a period of great thought and invention, with scientists such as Alessandro Volta and Luigi Galvani discovering new things and greatly contributing to Western science. Cesare Beccaria was also one of the greatest Italian Enlightenment writers, who was famous for his masterpiece