marks the passing of Johannes Rydberg. Rydberg was a Swedish physicist who discovered an empirical mathematical formula to predict the wavelengths of light emitted by hydrogen atoms. He noticed the wavelengths were proportional to a difference of integer values. He felt this was important in explaining the periodic nature of elements and continued working to find other mathematical patterns and relationships to the elements.
His empirical formula would later become important in the development of the Bohr model
of the atom and the introduction and development of quantum mechanics. Find out what else occurred on this day in science history