MARTIN BOND / SCIENCE PHOTO LIBRARY MARTIN BOND / SCIENCE PHOTO LIBRARY
Solar-powered ticket machine. Motorist buying a parking ticket at a solar- powered ticket machine. The machine possesses photovoltaic cells (blue), which convert sunlight into electricity. Each cell contains semiconductor materials. Energy from the Sun hitting the cells releases electrons in the semiconductors, which form an electric current. Photographed in Brighton, England.
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