FT IR Spectroscopy
How do you turn a signal recorded in the time domain into a frequency domain signal?

None of the above
Measurement of peak areas
Fourier transformation
By use of a Michelson interferometer

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

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
The nucleus spins faster

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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?

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

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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
That the sample is spun rapidly in the applied field
If the laboratory itself is imagined to be rotated at the Larmor frequency, viewing that individual magnetic moment vectors are fixed in space

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FT IR Spectroscopy
In FT-NMR, how are nuclei excited?

None of these
By radio-frequency radiation whose frequency is swept across a predetermined range
By an intense pulse of radiation which contains a wide range of frequencies
By an intense pressure

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