Question: For stage iii of the experiment
a. Find the magnitude of the probability amplitude for going from A to B through arm 1.
b. What is the orientation of the polarization reaching B coming from arm 1?
c. Find the magnitude of the probability amplitude for going from A to B through arm 2.
d. What is the orientation of the polarization reaching B coming from arm 2?
e. Find an expression for the probability for going from A to B in stage iii as a function of φ, the phase difference created by moving the mirror in arm 2.