Fréedericksz Transition

The Fréedericksz Transition is a phenomenon in liquid crystals where their internal molecular alignment changes when an electric or magnetic field reaches a certain threshold. Normally, liquid crystals are aligned in a specific direction, giving them unique optical properties. When a field surpasses this threshold, it reorients the molecules, altering their optical behavior. This transition is key in devices like LCD screens, allowing precise control of light transmission by applying electric fields to manipulate the liquid crystal alignment effectively and reversibly.