Verdet Definition

A Verdet constant is a physical quantity or property that characterizes the influence of an external magnetic field on the circulation of an electric current in a specific material or system. It is named after the Italian physicist Gian Battista Verdet, who first described it in 1872. The Verdet constant is crucial in the study of magneto-optical effects and has applications in devices such as magneto-optic modulators and Kerr cells.