The ionosphere is spread from 80 to 400 km. above the mesosphere. In this, electrically-charged particles are found which are called ions. On this basis, it is called the ionosphere. In this sphere, the presence of cosmic rays is there. The three layers are found in the ionosphere : the long and medium radio waves named D, E and F, and from these, E and F levels are reflected on the surface. If they were not there, then these waves would go into the infinite universe. In the ionosphere, there is the view of Aurora Borealis and Aurora Australis.
