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

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

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FT IR Spectroscopy
What does the Michelson interferometer do?

Selectively filter certain wavelengths from a beam of I.R. radiation
Split a polychromatic beam of radiation into its component wavelengths
None of these
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
When radiation energy is absorbed by a spin 1/2 nucleus in a magnetic field, what happens?

The angle of precession flips so that the magnetic moment of the nucleus opposes the applied field
None of these
The nucleus spins faster
The processional frequency of the nucleus increases

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