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Comparison between the concentration dependence of absorbance predicted by Beer's law and by the classical damped harmonic oscillator (CDHO) model (often also termed Lorentz‐ or Drude‐Lorentz model). The deviation from linearity disappears, if instead the peak values the dependence of the area of the band is plotted over concentration (for c ⋅ d=const., the band area is also constant).
