Unless otherwise specified, assume Si is the semiconductorand is at room temperature 300 K). For Si, the bandgapis E -1.10 eV with effective masses of mm -1.08 and mm -0.60, and effective densities of states at room temperature of N-(300) -2.82 x 1019 cm and N, (300) 1.17 x 10 cm. (Note The effective mass of an electron is complicated... you have to use m-0.26 to get the correct Ne(T). See the notes