To see the various colors that make up starlight, astronomers can use a prism to separate the colors. Common elements like helium and calcium in the atmospheres of stars block certain colors of light, ...
THE L III absorption edges of aluminium and magnesium have been measured. Since the continuous X-ray spectrum in this region (above 100 A.) is very feeble, I have used optical spark spectra from ...
ALTHOUGH much attention has been devoted to the broadening of spectral lines in the presence of foreign gases, little systematic work has been done on the effect of foreign gases on intensities of ...
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