The absorption lines in the infrared portion of the spectrum of a star that are produced by hydrogen are from the
A)Lyman series.
B)Balmer series.
C)Paschen series.
D)isotopes of hydrogen.
E)ions of hydrogen.

Question

Quizplus · Accepted Answer

The Paschen series of hydrogen transitions produce absorption lines in the infrared portion of the spectrum. The Lyman series produces absorption lines in the ultraviolet, and the Balmer series produces absorption lines in the visible and near-infrared portions of the spectrum. Isotopes and ions of hydrogen may also produce absorption lines, but the question specifically asks about the absorption lines produced by hydrogen itself.

The Absorption Lines in the Infrared Portion of the Spectrum