7.8. Assume, as in the Kronig-Penney model of Section 7.2, that w and Vo in Fig. 7.2 tend to zero...
7.8. Assume, as in the Kronig-Penney model of Section 7.2, that w and Vo in Fig. 7.2 tend to zero and infinity, respectively but their product Vow is kept constant. Determine with the aid of the Ziman model the widths of the nth allowed band and the nth forbidden band. Can you conclude that the higher the band the wider it is?