INSTRUMENTAL ANALYSIS EXAM
QUESTIONS AND DETAILED ANSWERS.
EXPERT VERIFIED FOR GUARANTEED
PASS.
Spectroscopy - ANS the branch of science concerned with the investigation and
measurement of spectra produced when matter interacts with or emits electromagnetic
radiation.
monochromator - ANS -A monochromator is an optical component which is used to produce
a beam of light with a very narrow bandwidth -effectively light of a single color.
-act as tunable bandpass filters for light.
monochromator grating - ANS they disperse ultraviolet, visible, and infrared radiation
typically using replica gratings, which are manufactured from a master grating.
UV-VIS spectroscopy - ANS refers to absorption spectroscopy or reflectance spectroscopy in
the ultraviolet-visible spectral region.
voltage follower - ANS -is a op-amp circuit which has a voltage gain of 1. This means that the
op amp does not provide any amplification to the signal.
-is a op-amp circuit which has a voltage gain of 1. This means that the op amp does not provide
any amplification to the signal.
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED
, UV-Vis light source - ANS Tungsten (visible), deuterium (UV), Hg (UV)
UV-Vis dispersion element - ANS prism or diffraction grating
prism - ANS -The dispersion occurs because the angle of refraction is dependent on the
refractive index of the prism's material
-Due to the chromatic dispersion of the material, the deflection angle becomes wavelength-
dependent.
phototube - ANS a photodetector based on a small glass tube containing electrodes where
the external photoelectric effect (or photoemissive effect) is utilized.
photoelectric effect - ANS the emission of electrons or other free carriers when light shines
on a material. Electrons emitted in this manner can be called photo electrons.
photomultiplier tube(PMT) - ANS - useful for light detection of very weak signals,
-a photoemissive device in which the absorption of a photon results in the emission of an
electron.
-detectors work by amplifying the electrons generated by a photocathode exposed to a photon
flux
neutral density filter - ANS -is a filter that reduces or modifies the intensity of all
wavelengths, or colors, of light equally, giving no changes in hue of color rendition.
-meant to reduce transmission
Deming's Quality Movement - ANS Quality management is focused not only on product and
service quality, but also on the means to achieve it.
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED
QUESTIONS AND DETAILED ANSWERS.
EXPERT VERIFIED FOR GUARANTEED
PASS.
Spectroscopy - ANS the branch of science concerned with the investigation and
measurement of spectra produced when matter interacts with or emits electromagnetic
radiation.
monochromator - ANS -A monochromator is an optical component which is used to produce
a beam of light with a very narrow bandwidth -effectively light of a single color.
-act as tunable bandpass filters for light.
monochromator grating - ANS they disperse ultraviolet, visible, and infrared radiation
typically using replica gratings, which are manufactured from a master grating.
UV-VIS spectroscopy - ANS refers to absorption spectroscopy or reflectance spectroscopy in
the ultraviolet-visible spectral region.
voltage follower - ANS -is a op-amp circuit which has a voltage gain of 1. This means that the
op amp does not provide any amplification to the signal.
-is a op-amp circuit which has a voltage gain of 1. This means that the op amp does not provide
any amplification to the signal.
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED
, UV-Vis light source - ANS Tungsten (visible), deuterium (UV), Hg (UV)
UV-Vis dispersion element - ANS prism or diffraction grating
prism - ANS -The dispersion occurs because the angle of refraction is dependent on the
refractive index of the prism's material
-Due to the chromatic dispersion of the material, the deflection angle becomes wavelength-
dependent.
phototube - ANS a photodetector based on a small glass tube containing electrodes where
the external photoelectric effect (or photoemissive effect) is utilized.
photoelectric effect - ANS the emission of electrons or other free carriers when light shines
on a material. Electrons emitted in this manner can be called photo electrons.
photomultiplier tube(PMT) - ANS - useful for light detection of very weak signals,
-a photoemissive device in which the absorption of a photon results in the emission of an
electron.
-detectors work by amplifying the electrons generated by a photocathode exposed to a photon
flux
neutral density filter - ANS -is a filter that reduces or modifies the intensity of all
wavelengths, or colors, of light equally, giving no changes in hue of color rendition.
-meant to reduce transmission
Deming's Quality Movement - ANS Quality management is focused not only on product and
service quality, but also on the means to achieve it.
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED
