clear all clc close epso=8.84*1e-12;//Permittivity of air in F/m rho=15*1e-3;//Charge density in C/m^3 Ebd=3*1e6;//Breakdown voltage in V/m //Thickness of dust layer in mm dbd=Ebd*epso/rho printf('Thickness of dust layer is %f mm',dbd*1e3)