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
2011 Volta a Portugal August 2011 – Sintra to Lisboa, 2011 Volta a Portugal The 2011 Volta a Portugal is a men's road bicycle race held from 4 to 15 August 2011. It is the 73rd edition of the men's stage race to be held, which was established in 1927. A part of the 2010–2011 UCI Europe Tour, it is rated as a 2.1 event. 14 teams are invited to the 2011 Volta a Portugal, but the Italian team Acqua & Sapone remove its inscription in the Volta a Portugal, due to lack of cyclists to participate. 1 team is from the UCI ProTeams,