FT IR Spectroscopy
What does the Michelson interferometer do?

None of these
Split a polychromatic beam of radiation into its component wavelengths
Selectively filter certain wavelengths from a beam of I.R. radiation
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
In FT-NMR, how are nuclei excited?

By an intense pressure
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

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