\(\mathrm{Fe}\left(\mathrm{H}_2 \mathrm{O}\right)_6^{2+}\) is a high-spin complex that absorbs light at about 1000 nm , corresponding to a transition between 5T2g and 5Eg levels. The wave number of the radiation is
1
100 cm-1
2
1000 cm-1
3
10,000 cm-1
4
100,000 cm-1