Fig. 5.

$⟨z_{max}|t⟩$ as a function of t for a two-layer medium ( $s_1=15\text{mm}$ , $s_2=75\text{mm}$ , $n_1=n_2=1.4$ , ${\mu }_{a1}={\mu }_{a2}=0.015\text{m}{\text{m}}^{-1}$ ). (a) variable ${\mu }_{s1}^{\mathrm{\prime }}=0.5,0.75,1.0,1.25,1.5\text{m}{\text{m}}^{-1}$ , fixed ${\mu }_{s2}^{\mathrm{\prime }}=1.0\text{m}{\text{m}}^{-1}$ ; (b) fixed ${\mu }_{s1}^{\mathrm{\prime }}=1.0\text{m}{\text{m}}^{-1}$ , variable ${\mu }_{s2}^{\mathrm{\prime }}=0.5,0.75,1.0,1.25,1.5\text{m}{\text{m}}^{-1}$ . In all cases $\rho =30\text{mm}$ , $n_{e1}=n_{e2}=1.0$ . Circles are DE results, lines are MC results.