Question $2$ of $13>$

The diagram of a Michelson interferometer and the resulting interferogram produced from a monochromatic source are shown. Explain how the interferometer and Fourier analysis are used in Fourier transform spectroscopy to create an infrared spectrum by placing the steps in the order they occur.

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Answer Bank

Radiation transmitted through the sample strikes the detector.

Radiation reflects off the movable and fixed mirrors and back to the beamsplitter.

An interferogram, plotting the radiation intensity versus retardation $()$ is produced.

Part of the recombined out of phase radiation travels back to the source and the other part travels towards the detector.

Some of the radiation is absorbed by the sample.

Fourier analysis of the interferogram decomposes it into its component wavelengths or frequencies, producing the sample spectrum.

Radiation from the source hits the beamsplitter and is partially transmitted to the movable mirror and partially reflected to the fixed mirror.

The transmission spectrum of the sample is produced by dividing the sample spectrum by the reference spectrum.