Discussion
What is the throughput advantage of a Fourier transform instrument called?
Answer: B
The Jacquinot advantage refers to the large circular aperture such an instrument can use in place of a narrow slit, admitting far more light. The Fellgett or multiplex advantage is the separate benefit of measuring all wavelengths at once. Nyquist concerns sampling and Doppler concerns motion. Two distinct advantages with two distinct names, and confusing them muddles an explanation of why the technique won.
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