For the arrangement of Figure (a) and Figure (b), electrons in the incident beam in region 1 have energy E = 766 eV and the potential step has a height of U, = 575 eV. What is the angular wave number in (a) region 1 and (b) region 2? (c) What is the reflection coefficient? (d) If the incident beam sends 5.61 x 105 electrons against the potential step, approximately how many will be reflected? Ve0 region 1 region 2 (a) Energy ---E. Electron (b)

For the arrangement of Figure (a) and Figure (b), electrons in the incident beam in region 1 have energy E = 766 eV and the potential step has a height of U, = 575 eV. What is the angular wave number in (a) region 1 and (b) region 2? (c) What is the reflection coefficient? (d) If the incident beam sends 5.61 x 105 electrons against the potential step, approximately how many will be reflected? Ve0 region 1 region 2 (a) Energy ---E. Electron (b)