A particle with mass m is in the lowest (ground) state of the infinte potential energy well, as defined in the provided image. At time t=0, the wall located at x = L is suddenly pulled back to a position at x = 2L. This change occurs so quickly that instantaneously the wave function does not change. Calculate the probability that a measurement of the energy will yield the ground-state energy of the new well. What is the probability that a measurement of the energy will yield the first excited energy of the new well?

A particle with mass m is in the lowest (ground) state of the infinte potential energy well, as defined in the provided image. At time t=0, the wall located at x = L is suddenly pulled back to a position at x = 2L. This change occurs so quickly that instantaneously the wave function does not change. Calculate the probability that a measurement of the energy will yield the ground-state energy of the new well. What is the probability that a measurement of the energy will yield the first excited energy of the new well?