Frequency of Absorption Measured in cm1(Wavenumbers) Wavelength units typically microns (um) 10,000μm=1cmor1μm=10-4cm Frequency units typically measured in cm-1 =waves or cycles in 1 cm (wavenumbers) Mid-Infrared frequency range is 4000-400 cm-] (2.5-25um)Frequency of Absorption Measured in cm-1 (Wavenumbers) Wavelength units typically microns ( m) 10,000 m = 1 cm or 1m = 10-4 cm Frequency units typically measured in cm-1 = # waves or cycles in 1 cm (wavenumbers) Mid-Infrared frequency range is 4000 - 400 cm-1 (2.5 - 25 m)