Assume that a system has a very large number of energy levels given by the formula εl=ε0l2εl=ε0l2 with ε0=1.25×10−22Jε0=1.25×10−22J, where ll takes on the integer values 1, 2, 3, . . . . Assume further that the degeneracy of a level is given by gl=2lgl=2l.
Calculate the ratio n2/n1 at 250. K.

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Aseasonal prevailing wind in the region of south and southeast asia, blowing from the southwest between may and september and bringing rain (the wet monsoon ), or from the northeast between october and april (the dry monsoon ).