الفهرس | Only 14 pages are availabe for public view |
Abstract Plasma is discovered and named as the fourth state of matter for the first time by Crookes in 1879. Later in 1923, Langmuir used the name \plasma”for explaining the inner region of ionized gas which is produced in an electric discharge tube. He found that plasma is an ionized neutral gas which consists of an equal amount of both positive ions and negative electrons approximately. It has 99% of the matter in the visible universe is in the plasma state, This estimate may not be very accurate, but it is certainly a reasonable one in view of the fact that stellar interiors and atmospheres, gaseous nebulae, and much of the interstellar hydrogen are plasmas |