The model proposed in 1913 by the Danish physicist Niels Bohr (and later further developed by Arnold Sommerfeld) to describe the hydrogen spectrum was of great importance in the historical development...The model proposed in 1913 by the Danish physicist Niels Bohr (and later further developed by Arnold Sommerfeld) to describe the hydrogen spectrum was of great importance in the historical development of atomic theory. In the simplest form, we could describe a model of an electron moving around a proton in a circular orbit. The Bohr theory has been remarkably successful in calculate the energy levels, wavelengths and series limits for hydrogenlike atoms. Yet it has its limitations.
