A series of very closely spaced absorption lines in stellar spectra
resulting from the absorption of light by molecules. Bands caused by
titanium oxide (→ TiO bands) and carbon compounds occur
in the spectra of low temperature M and C stars.
A range of wavelengths, usually in electromagnetic radiation, that are absorbed
by a given substance. Absorption bands are characteristic of molecules and correspond to
changes of electron orbits in the molecules. See also
→ anomalous dispersion.
See also: → absorption; → band.
