1. The problem statement, all variables and given/known data How many oscillations occur before Mxy decays to approximately 1/3 of its initial value, for a Larmor frequency of 100 MHz and T2 of 100ms? 2. Relevant equations I was learning about how NMR works and about transverse relaxation. According to what I learned, we can express transverse relaxation with cosine, sine, complex number and exponential decay function (Fd(t)=exp(-t/T2)). Thus, Mxy(t)= lMxy(t)l Fd(t)exp(-i(wt)). 3. The attempt at a solution I'm not sure where to put Larmor frequency in the formula. Are we trying to determine Fd(t) or Mxy? If I assume that we are determining Fd(t) which is the exponential decay function, then I would do the following: Set Fd(t)=100 MHz and t=100ms. Then, calculate for T2. From what I heard in the lecture, the answer should be 10^7 which I'm not getting. Any help would be appreciated!