The Peltier Effect is a thermoelectric phenomenon where heat is absorbed or released when an electric current passes through a junction of two different conductors or semiconductors. This effect is named after the French physicist Jean Charles Athanase Peltier, who discovered it in 1834. It is commonly used in devices like thermoelectric coolers, which can transfer heat from one side to another, creating a cooling effect. In practical applications, the Peltier Effect allows for precise temperature control in various technologies, including refrigeration and electronic cooling systems. By applying a voltage across a thermoelectric material, one side becomes hot while the other side becomes cold, enabling efficient heat management in compact spaces.