# PROBLEM 16 # 
Standard Formula used 
 E = (n^2 * h^2) / (8 * m * L^2)) 

 Energy of electron -
 For (n=1) is 6.688706e-19 J.
 For (n=2) is 2.675482e-18 J.
 For (n=3) is 6.019835e-18 J.