1.33         -0.02              ri: refractive index
  16                             nx: number of sizes
0.001                             x: size 1
0.003                             x: size ...
0.005                             x: size ...
0.01                              x: size ...
0.03                              x: size ...
0.05                              x: size ...
0.1                               x: size ...
0.3                               x: size ...
0.5                               x: size ...
1.0                               x: size ...
3.0                               x: size ...
5.0                               x: size ...
10.0                              x: size ...
20.0                              x: size ...
50.0                              x: size ...
100.                              x: size ...