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+//Optoelectronics - An Introduction, 2nd Edition by J. Wilson and J.F.B. Hawkes
+//Example 7.6
+//OS=Windows XP sp3
+//Scilab version 5.5.2
+clc;
+clear;
+
+//given
+e=1.6e-19;//Electronic charge in C
+Epsilonr=11.7;//Relative permittivity of medium
+Epsilon0=8.85e-12;//Permittivity of free space in SI Units
+Nd=5e21;//Doping level of the diode in m^-3
+V=100;//Reverse bias voltage in V
+
+xn=sqrt(2*Epsilon0*Epsilonr*V/(e*Nd));//Depletion region thickness in m
+mprintf("\n xn = %.1f um",xn/1e-6);//Dividing by10^(-6) to convert to um