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abstraction > mathematical concept > number > quantity > radiation measurement > spectral feature > spectral line > emission line > inverse P Cygni line

inverse P Cygni line
subject			fact

inverse P Cygni line	has definition An emission line in which the emission is on the violet side of the absorption. It is usually interpreted to mean infall of matter.
	is a kind of emission line
emission line	has antonym absorption line
spectral line	has transition
	has equivalent width
spectral feature	has wavelength
	has width
	occurs in
	has species
radiation measurement	has unit radiation unit
number	has value