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

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

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FT IR Spectroscopy
What does the Michelson interferometer do?

Split a polychromatic beam of radiation into its component wavelengths
None of these
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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