Question

The sample holder is generally inserted somewhere in the interval between the ______and _______

(a) Silvered film and multi-layered coating

(b) The light source and the detector

(c) The light source and silvered film

(d) Silvered film and the detector

I have been asked this question during an interview.

My question is based upon Methods of Monitoring Foetal Heart Rate topic in division Foetal Monitoring Instruments of Biomedical Instrumentation

Answer 1

Correct choice is (b) The light source and the detector

The explanation is: Gases may be contained in cells which are sealed or stoppered to make them air-tight. The sample holder is generally inserted somewhere in the interval between the light source and the detector. For the majority of analyses, a 10 mm path-length rectangular cell is usually satisfactory.