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Introduction
In a previous article “Calculating the Balmer Alpha Line” we mentioned how accurate predictions of the spectral lines of singly ionized Helium were of considerable importance in persuading the scientific community that Danish physicist Niels Bohr was on the right track in respect of his ground breaking atomic model first published in 1913. In this model bound electrons emit packets (quanta) of energy when they move from a higher energy state to a lower energy state. Observed spectral lines corresponded to specific frequencies of light (or electromagnetic radiation generally) associated with the transition energy between two such states.
The subject matter of this article is once again concerned with aspects of the calculation of such lines noting the differences as compared to calculating corresponding lines of the...
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