A molecule can vibrate in some ways, and each way is termed a "vibrational method". If a molecule has N atoms, linear molecules have 3N-five levels of vibrational modes Whilst nonlinear molecules have 3N-6 degrees of vibrational modes.Attenuated overall reflectance-Fourier remodel infrared spectroscopy (ATR-FTIR) is usually a Bodily way of composit