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//Variable declaration
n=1;
e=1.6*10**-19;
m=9.11*10**-31; //mass(kg)
h=6.63*10**-34; //planck's constant
L=1*10**-10; //width(m)
//Calculation
E1=n**2*h**2/(8*m*e*L**2); //energy value in g state(eV)
E3=3**2*E1; //energy value in 2nd quantum state(eV)
E=E3-E1; //energy required to pump an electron(eV)
//Result
printf('energy required to pump an electron is %0.3f eV \n',(E))
printf('answer varies due to approximating off errors\n')
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