A Langmuir Probe is a scientific instrument used to measure the electrical properties of plasmas, which are ionized gases consisting of charged particles. It typically consists of a thin metal wire or electrode that is inserted into the plasma. By applying a voltage to the probe, researchers can collect data on electron density, temperature, and other important characteristics of the plasma. The probe operates by analyzing the current that flows through it as a function of the applied voltage. This information helps scientists understand the behavior of plasmas in various applications, including fusion research, space physics, and semiconductor manufacturing.