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abstraction > mathematical concept > number > quantity > radiation measurement > spectral feature > set of lines > set of molecular lines > band head

band head
subject			fact

band head	has definition The conspicuous sharp boundary which usually occurs at the head of a molecular band and which fades gradually toward either longer or shorter wavelengths, depending on the quadratic relation between frequency and rotational quantum number.
	is a kind of set of molecular lines
set of molecular lines	has species molecule
spectral feature	has wavelength
	has width
	occurs in
radiation measurement	has unit radiation unit
number	has value