Referring to the previous problem, realize that there is a region between each pair of absorption bands for which the Cauchy Equation (with a new set of constants) works fairly well. Examine Fig. 3.41: what can you say about the various values of C₁as ω decreases across the spectrum? Dropping all but the first two terms, use Fig. 3.40 to determine approximate values for C₁and C₂for borosilicate crown glass in the visible.

Fig 3.40

Fig 3.41

Dense flint glass 1.7 1.6 Light flint glass Crystal quartz 1.5 Borosilicate crown glass Acrylic plastic Vitreous quartz 1.45 200 800 1000 400 600 Wavelength A (nm) Index of refraction n VKE W01 W02 W03 Infrared Visible Ultraviolet -