In a three level system, the second and third levels were found to be halfand a sixth as populated respectively, as the first (lowest) level. the level separati

in a three level system, the second and third levels were found to be halfand a sixth as populated respectively, as the first (lowest) level. The level separations are AE, = 20K joules and AE= TOK joules, where K is the magnitude of the Boltzmann constant. The system (a) is at about 9.1 K (b) is at about 16.7K (c) is at about 28.8 K (d) is not in thermal equilibrium