Corona discharge the electron-liberation is a high-energy photon from an atom within the plasma body relaxing after excitation from an earlier collision. The use of ionized neutral gas as a source of ionization is further diminished in a negative corona by the high-concentration of positive ions clustering around the curved electrode. Under other conditions, the collision of the positive species with the curved electrode can also cause electron liberation. The difference, then, between positive and negative coronas, in the matter of the generation of secondary electron avalanches, is that in a positive corona they are generated by the gas surrounding the plasma
Experiments and Observations on Electricity the Leyden jar had an accumulation of electrical fire, which he labeled as "positive" ("plus"), and the other side had a deficiency of electrical fire, labeled "negative" ("minus"). These losses and gains of electrification were exactly equal and are essentially the modern law of charge conservation except that it is now recognized that negative charges exist in their own right, not just as a deficiency of positive charges. It is an important principle in modern science that explains the microphysics of the electrification of gross bodies. In these letters, Franklin introduced technical words that we use today for things related