(Solution) - Use vector diagrams to predict the outcome of the sequence 90 x -(2025 Original AI-Free Solution)

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Use vector diagrams to predict the outcome of the sequence:
90°(x) - ? - 90°(x)
when applied to equilibrium magnetization. In your answer, explain how the x-, y- and z magnetizations depend on the delay T and the offset ?.
For a fixed delay, sketch a graph of the x- and y-magnetization as a function of the offset. At what values of QT do any nulls occur?