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//Example number 5.8, Page number 88
clc;clear;
close;
//Variable declaration
n=poly([0],'n');
a=4*10**-10; //width of potential well(m)
m=9.1*10**-31; //mass(kg)
e=1.6*10**-19; //charge(c)
h=6.626*10**-34; //plank constant
//Calculation
E1=n**2*h**2/(8*m*e*a**2); //maximum energy(eV)
//Result
disp(E1,"maximum energy in eV is")
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