For the arrangement of Figs. 38-14 and 38-15, electrons in the incident beam in region 1 have a speed of 1.60 107 m/s and region 2 has an electric potential of V2 500 V.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 3.00 109 electrons against the potential step, approximately how many will be reflected?

Weekly Assignment 13 https://session.masteringphysics.com/myct/assignmentPrintViewdispl... Weekly Assignment 13 Due: 9:00pm on Tuesday, April 26, 2016 To understand how points are awarded, read the Policy for this assignment. Problem 30.41 Part A What is the frequency of a photon that...