The importance of Compton scattering over the bremsstrahlung at the base of corona as a function of τ_cor (Eq. (38)). Solid lines in each package are computed for various values of χ = 0.18,0.26,0.40,0.57,0.67 and 0.86. Each package is calculated for three different values of magnetic pressure: β_m = 0,10 and 100. The horizontal dashed line represents the case where Λ_C/ Λ_B = 1, while vertical dotted lines mark values of coronal optical depth for which it happens.