different index of 1.80 and 1.57-0.56i is considered because the Mie scattering calculation is related to the
refractive index m of the soot. Three types of the soot diameter distribution based on Johnson_SB function are
chosen and their distribution parameters are =2.5 =-2.0 =3.8 =2.0 =4.8 =0.0.
Fig. 1 and Fig. 2 show the numerical simulation result of the difference index m. Fig. 3 and Fig. 4 show the
numerical simulation result of the difference diameter distribution