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Plasma physics studies plasma, often called the fourth state of matter, distinct from solid, liquid, and gas. It's an electrically conducting medium composed of roughly equal numbers of positively and negatively charged particles, created when gas atoms ionize. The negative charge is typically carried by electrons, and the positive charge by ions. Electromagnetic forces significantly influence plasma behavior, causing it to act collectively like a fluid.1

Most visible matter in the universe exists as plasma, including stars, auroras, and lightning. In laboratories, plasma is produced by heating gases to high temperatures. Future applications of plasma physics are largely in power generation, particularly through nuclear fusion reactors. Plasma is also utilized in lighting (like neon and fluorescent tubes), welding, and particle accelerators. The term "plasma" was introduced in 1923 by Irving Langmuir.123

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