The Spectra of the Lighter Elements

Abstract

IT is well known that the immediate acceptance of the Bohr atom by physicists was largely due to its quantitative success in explaining the spectra of hydrogen and ionised helium. While the problem of the general atom containing two or more electrons is much more complicated, Bohr, by making use of his Principle of Correspondence (Supplement to NATURE of July 7), has already shed considerable light upon it. In consequence of this, much stimulus has been given to the study of optical and X-ray spectra, particularly those of the lighter elements. The older data have been re-examined in the light of the new Bohr atom, and further lines of experimental approach suggested by it have been initiated. At the recent meeting of the British Association at Liverpool, many of the leading workers in this subject were present, and took part in a general discussion upon it opened in Section A by the president, Prof. J. C. McLennan. The subjoined synopsis of the remarks of the principal speakers will be read with interest by all students of physical science.