1. ConcepTest #69 The time independent Schroedinger equation for the particle in the box is (inside the box). The wave function is proposed as a possible solution to the Schroedinger equation. Which of the following is ? 1. 2. 3. 4. 5. 6.

2. ConcepTest #70 According to the Schroedinger equation, the behavior of the wave function  in a given region of x depends on whether E > U or E < U in that region. Which of the following is correct about the graph of  vs. x ? 1. When E > U,  curves towards the axis, and thus is exponential. 2. When E > U,  curves away from the axis, and thus is exponential. 3. When E > U,  curves towards the axis, and thus is oscillatory. 4. When E > U,  curves away from the axis, and thus is oscillatory.

4. ConcepTest #71 A particle with total energy E > U 2 is approaching a step barrier with U 2 > U 2, as sketched. Consider the region 1 to the left of the step, and the region 2 to the right of the step, as shown, along with the following choices: a) Where is the kinetic energy of the particle larger? b) Where is the wavelength of the particle larger?