Question

Which spectrometer allows analysis of carbon and sulfur?

(a) Vacuum spectrometer

(b) Airpath spectrometer

(c) Tube spectrometer

(d) Rayleigh spectrometer

I have been asked this question in exam.

This intriguing question comes from Metal Composition Testing, Inspection of Materials topic in division Testing of Materials, Foundry & Powder Metallurgy of Engineering Material & Metallurgy

Answer 1

Right choice is (a) Vacuum spectrometer

The best explanation: In a spectrometer, only selected wavelengths are recorded through entrance slits. These are dispersed by the grating and then go through exit slits for a particular set of elements. Airpath spectrometer does not allow determination and analysis of carbon and sulfur, whereas vacuum spectrometer does.