What is used to check the wavelength calibration of a spectrometer?(a) Absorption filter(b) Helium oxide filter(c) Homium oxide filter(d) Helium dioxide filterI got this question by my college professor while I was bunking the class.My question is based upon Transmission of Digital Audio topic in chapter Telemedicine Technology of Biomedical Instrumentation

What is used to check the wavelength calibration of a spectrometer?(a)

1.	What is used to check the wavelength calibration of a spectrometer?(a) Absorption filter(b) Helium oxide filter(c) Homium oxide filter(d) Helium dioxide filterI got this question by my college professor while I was bunking the class.My question is based upon Transmission of Digital Audio topic in chapter Telemedicine Technology of Biomedical Instrumentation
Answer» Correct answer is (c) Homium oxide filter To explain: Wavelength calibration of a spectrophotometer can be CHECKED by using a holmium oxide filter as a wavelength standard. Holmium oxide glass has a number of sharp ABSORPTION BANDS, which occur at PRECISELY known wavelengths in the visible and ultraviolet regions of the spectrum.

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