ii. Figure 2 shows this fraction as a function of temperature for pe = 3 Pa. At what temperature (roughly) can we expect a maximum in the intensity of Balmer lines? Fraction of hydrogen atoms in first excited state 10-5 10-8 10-10 10-12 10-4 10-16 5000 10000 15000 20000 25000 30000 T(K) Figure 2