Which of the following options are correct in terms of wavelength for the different types of IR spectrometer?(a) Near IR: 0.8 – 2.5 mm(b) Mid IR: 0.8 – 2.5 mm(c) Far IR: 2.5 – 50 mm(d) Mid IR: 50 – 100 mmThe question was asked in final exam.My query is from Instrumentation of IR topic in section Colorimetry and Spectrometry of Analytical Instrumentation

Which of the following options are correct in terms of wavelength for

1.	Which of the following options are correct in terms of wavelength for the different types of IR spectrometer?(a) Near IR: 0.8 – 2.5 mm(b) Mid IR: 0.8 – 2.5 mm(c) Far IR: 2.5 – 50 mm(d) Mid IR: 50 – 100 mmThe question was asked in final exam.My query is from Instrumentation of IR topic in section Colorimetry and Spectrometry of Analytical Instrumentation
Answer» Right option is (a) NEAR IR: 0.8 – 2.5 mm To explain I would SAY: Wavelength of near IR is 0.8 – 2.5 mm and for mid IR it is 2.5 – 50 mm. The wavelength of FAR IR is 50 – 1000 mm.

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