Plasma | Physics, State of Matter, & Facts | Britannica
2024年10月30日 · Plasma, in physics, an electrically conducting medium in which there are roughly equal numbers of positively and negatively charged particles, produced when the atoms in a gas become ionized. It is sometimes referred to as the fourth state of matter, distinct from the solid, liquid, and gaseous states.
Plasma physics | physics | Britannica - Encyclopedia Britannica
In plasma: The development of plasma physics. The modern concept of the plasma state is of recent origin, dating back only to the early 1950s. Its history is interwoven with many disciplines. Three basic fields of study made unique early contributions to the development of plasma physics as a discipline:…. Read More.
Plasma - Oscillations, Parameters, Interactions | Britannica
2024年10月30日 · Basic plasma physics Plasma formation. Apart from solid-state plasmas, such as those in metallic crystals, plasmas do not usually occur naturally at the surface of the Earth. For laboratory experiments and technological applications, plasmas …
Plasma - Natural, State, Matter | Britannica
2024年10月30日 · Plasma - Natural, State, Matter: It has been suggested that the universe originated as a violent explosion about 13.8 billion years ago and initially consisted of a fireball of completely ionized hydrogen plasma.
Plasma - Fusion, Lighting, Astronomy | Britannica
2024年10月30日 · Plasma - Fusion, Lighting, Astronomy: The most important practical applications of plasmas lie in the future, largely in the field of power production. The major method of generating electric power has been to use heat sources to convert water to steam, which drives turbogenerators.
Plasma | Definition, Function, & Composition | Britannica
plasma, the liquid portion of blood. Plasma serves as a transport medium for delivering nutrients to the cells of the various organs of the body and for transporting waste products derived from cellular metabolism to the kidneys, liver, and lungs for excretion.
plasma and plasma physics - Students | Britannica Kids
Plasma is sometimes called the fourth state of matter because plasmas possess remarkable properties not found in ordinary solids, liquids, and gases. Because the free electrons are extremely mobile, for example, plasmas are excellent conductors of heat and electricity.
Plasma - Waves, Particles, Interactions | Britannica
2024年10月30日 · Plasma - Waves, Particles, Interactions: The waves most familiar to people are the buoyancy waves that propagate on the surfaces of lakes and oceans and break onto the world’s beaches. Equally familiar, although not necessarily recognized as waves, are the disturbances in the atmosphere that create what is referred to as the weather.
plasma summary | Britannica
plasma, Electrically conducting medium in which there are roughly equal numbers of positively and negatively charged particles, produced when the atoms in a gas become ionized (see ionization). Plasma is sometimes called the fourth state of …
Plasma - Ionosphere, Upper Atmosphere, Electrons | Britannica
2024年10月30日 · Plasma - Ionosphere, Upper Atmosphere, Electrons: At altitudes below about 2,000 kilometres, the plasma is referred to as the ionosphere. Thousands of rocket probes have helped chart the vertical structure of this region of the atmosphere, and numerous satellites have provided latitudinal and longitudinal information.