flash spectrum

noun
: a bright-line spectrum produced by the sun's reversing layer and observable for a few seconds at the beginning and end of a total solar eclipse

* * *

Astron.
the emission spectrum of the chromosphere of the sun, which dominates the solar spectrum in the seconds just before and after a total solar eclipse.
[1895-1900]

* * *

flash spectrum,
(in a total solar eclipse) a bright-line spectrum that flashes out for a few seconds from the edge of the sun at the beginning and end of the time when all of its direct light is cut off.

Useful english dictionary. 2012.

Look at other dictionaries:

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