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

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

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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 increase sensitivity
To ensure that all target nuclei in the sample have been excited
To remove inaccuracies caused by fluctuations in the applied magnetic field

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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 processional frequency of the nucleus increases
The angle of precession flips so that the magnetic moment of the nucleus opposes the applied field

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

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

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