1 For severe stains, add 1-2 cups vinegar to the wash cycle as well. 2  To remove a rust stain from your cotton work clothes, moisten the spot with some full-strength vinegar and then rub in a bit of salt. 3  If itâs warm outdoors, let it dry in the sunlight (otherwise a sunny window will do), then toss it in the wash.
absorption spectrum - the spectrum of electromagnetic radiation that has passed through a medium that absorbed radiation of certain wavelengths. spectrum - an ordered array of the components of an emission or wave.
Stellar Spectra. The spectrum below is an intensity plot of a star. Note the characteristic absorption line features including strong lines for HÎ±, HÎ², HÎ³ and HÎ´ - the Balmer Series. The overall shape of the spectrum approximates a black body curve with a peak wavelength.