Heterogeneous Structure and Excess Scattering

D is called the correlation length and is a measure of the size of the heterogeneous structure inside the bulk. The turbidity r is divided into three terms, namely. 

The light scattering loss a (dB/km) is obtained by substituting Equation 2.26 into Equation 2.20. The losses corresponding to each turbidity in Equations 2.27-2.30 are defined as a, a °, a , and a °, respectively that is. 

Experimentally, V y° and V y° are separated as follows By rearranging Equation 2.25, a plot of V y versus (the Debye plot) yields a straight line, and the correlation length D can be determined by D = (A/2 r)/(slope/intercept) /. Therefore, by gradually changing the Vy value from 0 to the observed Vy, the V y° at which the Debye plot becomes closest to a straight line is obtained by a least-squares technique. 

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