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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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
None of these
To increase sensitivity
To remove inaccuracies caused by fluctuations in the applied magnetic 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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