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+//Optoelectronics - An Introduction, 2nd Edition by J. Wilson and J.F.B. Hawkes
+//Example 2.8
+//OS=Windows XP sp3
+//Scilab version 5.5.2
+clc;
+clear;
+
+//given
+Lz=10e-9;//Thickness of a GaAs quantum well in m
+m=9.1e-31;//Rest mass of an electron in kg
+me=0.068*m;//Mass of electrons in conduction band
+mh=0.56*m;//Mass of electrons in valence band
+h=6.62e-34;//Planck's constant in SI Units
+
+DeltaEg=(h^2)/(8*(Lz)^2)*(1/me+1/mh);//Energy gap in the GaAs quantum well
+mprintf("DeltaEg = %.2e J",DeltaEg);