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Does anyone see anything useful coming from taking the time derivative of A(t) and B(t) as described in class and setting it equal to zero? In a magnetic field, will there ever be a time period over which the probability of finding a particle spin up or spin down will not change at all?

I'm really struggling with problem 32(a) on the homework. Anyone have any helpful suggestions to get me started?

You may want to find out the coefficient of kai first.

Is A(t), as we discussed in class, the probability of finding the spin up or down concerning the measurement of a single particle rather than just a random particle out of a system of many? If so, what about repeated measurements (does the measurement process affect the spin)?

I'm still a little confused about today's discussion problem. Do we only need to concern ourselves with the m = 0 state for when we are dealing with particles of spin 1, such as photons? Or does <math>m = {\pm}1</math> also come into effect when solving for the S matrices?

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