As it demonstrated that how the electron could orbit the nucleus without falling into it.
Explanation:
According to Bohr's model, the electrons revolve around the nucleus at a confined distance in fixed orbits. As long as the electrons move around the orbits, they neither lost nor attain any kind of energy. The jumping of electrons from one orbit to another only takes place when some kind of energy is lost or is supplied.
Hence, the atom will remain completely stable in the state comprising the smallest orbit, as there is no orbit of lower energy into which the jumping of electrons takes place. Therefore, Bohr's atomic model is superior to all the previous models, as it has demonstrated how the electrons could revolve around the nucleus without falling into it.
1) it explains about stability of an atom by including stationary state. 2) it explains tge quantization of energy. 3) it gives the concept of angular momentum of a revolving electron.
An epidemic (from Greek ἐπί epi "upon or above" and δῆμος demos "people") is the rapid spread of disease to a large number of people in a given population within a short period of time.
