2 An electron that has an energy of approximately $6\U{eV}$ moves
3 between rigid walls $1.00\U{nm}$ apart. Find \Part{a} the quantum
4 number $n$ for the energy state that the electron occupies
5 and \Part{b} the precise energy of the electron.
6 \end{problem} % based on 28.38
10 The allowed energy levels for a particle in a box are (Equation 28.30)
12 E_n &= \frac{h^2 n^2}{8mL^2} \;.
14 For an electron ($m=9.11\E{-31}\U{kg}$) in a box of length
15 $L=1\U{nm}$, this works out to
23 So the electron is in the $\ans{n=4}$ state.
26 The precise energy is $E_4 = \ans{6.02\U{eV}}$.