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Match each measurement mode with its usual application.
List I
A. Reflectance
B. Regular transmission
C. Diffuse transmission
D. Total transmission
List II
1. translucent and scattering samples
2. opaque solids such as textiles and paint
3. the sum of regular and diffuse components
4. clear liquids and transparent films

  • A.A-2, B-4, C-1, D-3
  • B.A-4, B-2, C-1, D-3
  • C.A-2, B-4, C-3, D-1
  • D.A-3, B-1, C-4, D-2

Answer: A

The mode must suit the optical character of the sample being measured. Using regular transmission on a scattering sample loses much of the light entirely. The mode must suit the optical character. A scattering sample needs the diffuse mode.

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