- 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.
Origin of flash spectrum
First recorded in 1895–1900
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for flash spectrum
Near the central line it is little more than a flash, thus giving rise to the term “flash-spectrum.”