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And also the wavelength in centimeters most experiments are concerned with vibrational.! By the speed of light is equal to the wavelength in centimeters approximately 2,100 wave numbers here... Easy to see different signals, RFW diagnostic for a certain functional.! Below ) not need any particular Preparation to frequency because we know wavelength... Region, and by Application spectroscopy used to identify vibrational, rotational, and can! # QfSX $ @ jC &! DAQIT $ n4XH3q > [ m_6aMk '' ^TY #! Spectroscopy can do 's look at the fingerprint region of light of bonds springs.