The Faraday Effect is a phenomenon in which the polarization plane of light is rotated when it passes through a material in the presence of a magnetic field. Discovered by Michael Faraday in 1845, this effect occurs in certain materials, such as glass or crystals, that exhibit magneto-optical properties. The degree of rotation depends on the strength of the magnetic field and the properties of the material. This effect has practical applications in various technologies, including optical isolators and magneto-optical storage devices. By utilizing the Faraday Effect, these devices can control light and improve data storage efficiency, making it an important concept in both physics and engineering.