On the quantum theory of radiation and the structure of the atom

by Niels Bohr

corresponds to the radiation emitted when an electron jumps from ring 2 to ring 1, and that the line

, corresponds to a jump from ring 3 to ring 1. On this view, we should expect that the

radiation consists of as many lines as there are rings in the atom, the lines forming a series of rapidly increasing intensities. For the

radiation, Kossel makes assumptions analogous to those for the

radiation, with the distinction that the radiation is ascribed to the removal of an electron from ring 2 instead of ring 1. A possible