↳

A possible answer is the spectral range being analyzed; Far, Near and Mid-infrared regions of the spectrum. Another less likely answer is the type of material the FTIR is meant to analyze; biological vs inorganic. FTIR is different from dispersive IR. In dispersive IR a monochromatic light is passed through the sample and the intensity is monitored and compared to the original light intensity. The % absorption is reported at a wavelength over the spectrum wavelengths. The prism separates the light into monochromatic wavelength to impinge on the sample and bypass the sample to obtain the fraction absorbed. FTIR is an active measurement. Wikipedia says, "The term Fourier-transform infrared spectroscopy originates from the fact that a Fourier transform (a mathematical process) is required to convert the raw data into the actual spectrum." Less

↳

I told them I envision myself to be able to rise and lead and inspire my future colleagues. Less