WarmUp Exercise #5, 9/7  (Assignment Due 9/9)

We are almost done with the postulates!  Soon we will be solving problems and using all that we have learned over the past 2+ weeks.  Before then, we need to consider measurement in quantum mechanics and specifically how it related to a superposition of states (we will talk about the probability current density first).

Think about and answer the following:

A particle is in a one-dimensional box (energy levels n² E₁).  The particle suffers a small perturbation (a quantum bump of some sort) and emits a photon of frequency hbar omega = 3E₁.  A student in your class concludes that the particle was in the state psi₂ before the perturbation.   Is he/she correct?  Why or why not?

Answer in the form below, a short answer for each is fine. 
This report is due by 8:00 am Thursday morning.