FT IR Spectroscopy
The frequency of precession, the transition frequency and the Larmor frequency are

same terms for the same frequency
same terms for the different frequency
different terms for the different frequency
different terms for the same frequency

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FT IR Spectroscopy
When radiation energy is absorbed by a spin 1/2 nucleus in a magnetic field, what happens?

The nucleus spins faster
None of these
The angle of precession flips so that the magnetic moment of the nucleus opposes the applied field
The processional frequency of the nucleus increases

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FT IR Spectroscopy
What is meant by rotating frame of reference?

If the laboratory itself is imagined to be rotated at the Larmor frequency, viewing that individual magnetic moment vectors are fixed in space
That the sample is spun rapidly in the applied field
That the detector rotates around the sample
None of these

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