Change of angle of refraction with composition comprises the working principle of a___________________?
Correct answer: D. Refractometer
- A. Polarimeter
- B. Polarograph
- C. Spectrometer
- D. Refractometer
Explanation
A refractometer determines composition or concentration from the refractive index, which changes with the angle of refraction. A polarimeter instead measures optical rotation, while a polarograph measures current-voltage behaviour.
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