The Seebeck Effect is a phenomenon where a voltage is generated in a circuit made of two different conductors when there is a temperature difference between them. This effect occurs because the charge carriers in the materials move from the hot side to the cold side, creating an electric current. This effect is named after the German physicist Thomas Johann Seebeck, who discovered it in 1821. The Seebeck Effect is the principle behind thermoelectric generators, which convert heat energy into electrical energy, and is used in various applications, including power generation and temperature measurement.