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

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

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

That the detector rotates around the sample
None of these
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

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FT IR Spectroscopy
What does the Michelson interferometer do?

Modulate the I.R. signal at a lower frequency, so that it can be observed by a detector
Selectively filter certain wavelengths from a beam of I.R. radiation
None of these
Split a polychromatic beam of radiation into its component wavelengths

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