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For silicon at room temperature a. find the density of states in the valence energy band that is kaT below Ev. Use the formula derived in the lecture notes: N(E)=\frac{\sqrt{2}}{\pi^{2}}\left(\frac{m_{h}^{*}}{\hbar^{2}}\right)^{3 / 2} \sqrt{E_{v}-E} The effective mass of a hole in the silicon valence band is mh = 0.81 * mo b. Find the "effective" density of states N, in cm3 for the value calculated in part a.

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