Lyman series(redirected from Lyman alpha)
Lyman series:see spectrumspectrum,
arrangement or display of light or other form of radiation separated according to wavelength, frequency, energy, or some other property. Beams of charged particles can be separated into a spectrum according to mass in a mass spectrometer (see mass spectrograph).
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Lyman series() A series of spectral lines of atomic hydrogen with wavelengths in the far ultraviolet and extreme ultraviolet regions of the spectrum (see hydrogen spectrum). The Lyman alpha (Ly α) line occurs at 121.6 nm and the Lyman limit at 91.2 nm. Ly α emission and absorption lines occur, for example, in the spectra of quasars.
Collins Dictionary of Astronomy © Market House Books Ltd, 2006
Lyman series[′lī·mən ‚sir·ēz]
A group of lines in the ultraviolet spectrum of hydrogen covering the wavelengths of 121.5-91.2 nanometers.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.