Process by which electromagnetic radiation, including visible light, incident on a material releases an electric charge. It is commonly thought of as the emission of electrons from a substance (usually a metallic surface) when it is struck by photons (quanta of electromagnetic radiation), usually those of visible light or ultraviolet radiation.
Green represents fertility. Yellow stands for sunshine. Black recalls the people's African origins. Red symbolizes the struggle for liberty. Effective date: 19 September 1983.