Discussion
Match each instrument component with its function.
List I
A. Light source
B. Monochromator or filters
C. Detector
D. Integrating sphere
List II
1. converting the light into an electrical signal
2. illuminating the sample under measurement
3. collecting light from all directions
4. separating the light by wavelength
Answer: D
Correct answer: A-2, B-4, C-1, D-3
Four components in the order the light meets them. The source illuminates the sample; the monochromator or filter set separates the returned light by wavelength; the detector converts it into an electrical signal. The integrating sphere is the optional element that collects light from all directions, which is what makes diffuse geometry and the specular included measurement possible.
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