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+//Optoelectronics - An Introduction, 2nd Edition by J. Wilson and J.F.B. Hawkes
+//Example 7.8
+//OS=Windows XP sp3
+//Scilab version 5.5.2
+clc;
+clear;
+
+//given
+d=5e-6;//Thickness of Si layer in m
+D=3.4e-3;//Minority carrier diffusion coefficient in m^2 s^-1
+
+Tdiff=(d^2)/(2*D);//Diffusion time of carriers in s
+mprintf("\n Tdiff = %.1e s",Tdiff);