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Peston defines $B(T_\lambda;I_1\rightarrow I_2)$ by averaging over the initial magnetic $m$ states of $I_1$and summing over the final magnetic states of $I_2$. How can one show that this does not mean that a single initial magnetic subtate can cause transition to the many fimal magnetic substate at the sane time. I know this can be answered but I am looking for a good answer.

SAKhan
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1 Answers1

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It is not obvious to me that a single initial magnetic substate cannot transition to a superposition of many final magnetic substates. So I am not sure anyone can show what you want.

akhmeteli
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