The trailblazing Harvard scientist, who documented the dominance of hydrogen and helium in stars, is still inspiring ...

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.

DURING 1932, work has been carried on in this laboratory on the measurement of the relative intensity of spectral lines in the above elements. The amount of material available was very limited ...

Checking for the presence of elements that have primary ... be resolved both spectrally and temporally to yield spectra containing the atomic emission lines corresponding to the atoms present ...

As a result each produces photons with different energy and so the line spectra for different elements will be different. This means that line spectra can be used to identify elements. Continuous ...

A section of iron's atomic spectrum. Each element on the periodic table gives off a unique set of spectral lines that are carefully cataloged by the group. The overwhelming support exists because the ...