Consider a system of two levels E1= 0, g1= 1 and E2= 1.6 X1020J, g2 = 2 is populated by N atoms at temperature T. See the figure below n1. E2= 1.6 X10 20J, g2=2 N= n1 + n2 n2 E1= 0, g1= 1 The average energy at T= , is a. 0.6 €2 b. 0 c. 0.67€ d. 1.5€2
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