What is Ionosphere?
What is Ionosphere? The ionized region of the earth’s upper atmosphere extending from about 40 km to the height of a few earth radii above the surface of the earth, is referred to as the ionosphere. The ionosphere is made up of electrons, and positive and negative ions in the background of neutral particles of the atmosphere. The concentration of the neutral particles is much greater than that of the charged species, so that the ionosphere is a weakly ionized medium. The direct interactions of the atmospheric constituents, such as oxygen and nitrogen, with X-ray and ultraviolet radiation from the sun produce electrons and positive ions simultaneously in the ionosphere . A few electrons that are so produced, adhere to the neighbouring neutral particles to create negative ions. Also some electrons recombined with neighbouring positive ions to reproduce the original neutral particles. In this way the generation and the loss of electrons and ions in the ionosphere occu...