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diff --git a/3768/CH5/EX5.4/Ex5_4.sce b/3768/CH5/EX5.4/Ex5_4.sce
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+//Example number 5.4, Page number 85
+
+clc;clear;
+close;
+
+//Variable declaration
+a=2*10**-10;    //length(m)
+n1=2;
+n2=4;
+m=9.1*10**-31;    //mass(kg)
+e=1.6*10**-19;    //charge(c)
+h=6.626*10**-34;   //plank constant
+//Calculation
+E2=n1**2*h/(8*m*e*a);      //energy of second state(eV)
+E4=n2**2*h/(8*m*e*a);      //energy of fourth state(eV)
+//Result
+printf("energy of second state is %.5e eV",E2)
+printf("\n energy of second state is %.5e eV",E4)