Jean-Claude Bünzli sheds light on why europium — an element that is neither abundant ... Mendeleev's table by deciphering atomic optical spectra. Today this task seems rather easy, and could ...
When photons of light pass through a gas ... Because the energy levels are the same, the lines in the emission spectra of an element are in the same position as the lines in the absorption ...
Studying the line spectra produced by hot gases and absorbed by cooler gases allows us to identify the elements in stars. When a gas is very hot, it doesn’t emit all wavelengths of light.