Question

In the most widely used beam splitter, a thin film of ________ is sandwiched between two plates of low refractive index solid. Fill the blank with a suitable option.

(a) Mylar

(b) Silicon carbide

(c) Ferrous oxide

(d) Silver chloride

I have been asked this question in a job interview.

Query is from Fourier Transform Infra-red Spectrometers topic in division Colorimetry and Spectrometry of Analytical Instrumentation

Answer 1

The correct choice is (a) Mylar

The best I can explain: Generally, mylar is the thin film used in beam splitters. Beam splitter has to pass 50% of the radiation and reflect 50% of the radiation.