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+//Example number 11.1, Page number 246
+
+clc;clear;
+close;
+
+//Variable declaration
+e=1.6*10**-19;     //charge(coulomb)
+v=3*10**3;   //velocity of matter wave(m/s)
+h=6.6*10**-34;    //plank's constant(Js)
+lamda=600*10**-9;    //wavelength(m)
+//Calculation
+Ej=h*v/lamda;    //matter wave energy(J)
+E=Ej/e;      //matter wave energy(eV)
+//Result
+printf("matter wave energy is %.2e eV",E)
+//answer given in the book is wrong