How to determine the resolution (I)

The objects measured by FTIR have a wide range of solids, liquids, and gases. Among them, solids and liquids generally have a relatively broad absorption range from several cm-1 to several tens of cm-1 in the infrared region. For this reason, such substances are also measured by high resolution as well as by low resolution measurements. On the other hand, the gas is slightly different. Compared with liquids and solids, gas can be moved unfettered due to the rotation of the molecules, and the absorption is sharp. Further, since the energy level of the reference vibration is a complex energy level beam, sharp absorption lines having extremely small wave numbers are formed. Therefore, unlike liquids and solids, it holds a fine spectral structure.

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