(Solved): B1 (10) Calculate the atomic packing factor for a face-centered cubic (FCC) lattice? B2 (15) Consid ...

B1 (10) Calculate the atomic packing factor for a face-centered cubic (FCC) lattice? B2 (15) Consider an electron trapped at energy level, $\mathrm{n}=3$, in a 1D infinite potential well. What is the width $\mathrm{L}$ needed such that when the electron goes to the ground state $(n=1)$ the photon released has a wavelength of $?=550$ $\mathrm{nm}$ ? Fill the band diagram on the right. Fill the diagram on the right with the correct material classification.