Figure 5-18: R I V U X G
Iron in the Sun The upper part of this figure is a portion of the Sun’s spectrum at violet wavelengths, showing numerous dark absorption lines. The lower part of the figure is a corresponding portion of the emission line spectrum of vaporized iron. The iron lines coincide with some of the solar lines, which proves that there is some iron (albeit a relatively small amount) in the Sun’s atmosphere.
(Carnegie Observatories)