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

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

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FT IR Spectroscopy
Why is it advantageous to record many FID signals from the same sample and then add them together?

None of these
To ensure that all target nuclei in the sample have been excited
To increase sensitivity
To remove inaccuracies caused by fluctuations in the applied magnetic field

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FT IR Spectroscopy
What does the Michelson interferometer do?

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

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