flash spectrum


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flash spectrum:

see chromospherechromosphere
[Gr.,=color sphere], layer of rarefied, transparent gases in the solar atmosphere; it measures 6,000 mi (9,700 km) in thickness and lies between the photosphere (the sun's visible surface) and the corona (its outer atmosphere).
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flash spectrum

The emission spectrum of the solar chromosphere and E-corona. It is observable only for a few seconds during a total solar eclipse, at the beginning and end of totality. The majority of the spectral lines have the same wavelengths as the Fraunhofer lines of the photospheric spectrum. Their presence in successive spectrograms taken during an eclipse provides information on the distribution of elements in the chromosphere.
Collins Dictionary of Astronomy © Market House Books Ltd, 2006

flash spectrum

[′flash ‚spek·trəm]
(astronomy)
The emission spectrum of the sun's chromosphere, observed for a few seconds just before and just after a total solar eclipse.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Preliminary report of the expedition to the south limit of totality to obtain photographs of the flash spectrum in high solar latitudes.
The flash spectrum without an eclipse region 44800-46600.