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- https://chem.libretexts.org/Bookshelves/Analytical_Chemistry/Instrumental_Analysis_(LibreTexts)/07%3A_Components_of_Optical_Instruments/7.03%3A_Wavelength_SelectorsIn optical spectroscopy we measure absorbance or transmittance as a function of wavelength. Unfortunately, we can not isolate a single wavelength of radiation from a continuum source, although we can ...In optical spectroscopy we measure absorbance or transmittance as a function of wavelength. Unfortunately, we can not isolate a single wavelength of radiation from a continuum source, although we can narrow the range of wavelengths that reach the sample. A wavelength selector passes a narrow band of radiation characterized by a nominal wavelength, an effective bandwidth, and a maximum throughput of radiation. Several types of wavelength selectors are considered in this section.
- https://chem.libretexts.org/Courses/Northern_Alberta_Institute_of_Technology/CHEM1130_Principles_in_Chemistry_I/4%3A_Chemical_Calculations/4.7%3A_Overview_of_SpectroscopyThe focus of this chapter is on the interaction of ultraviolet, visible, and infrared radiation with matter. Because these techniques use optical materials to disperse and focus the radiation, they of...The focus of this chapter is on the interaction of ultraviolet, visible, and infrared radiation with matter. Because these techniques use optical materials to disperse and focus the radiation, they often are identified as optical spectroscopies. For convenience we will use the simpler term spectroscopy in place of optical spectroscopy; however, you should understand that we are considering only a limited part of a much broader area of analytical techniques.
- https://chem.libretexts.org/Bookshelves/Analytical_Chemistry/Analytical_Chemistry_2.1_(Harvey)/10%3A_Spectroscopic_Methods/10.01%3A_Overview_of_SpectroscopyThis chapter explores the interaction of electromagnetic radiation with matter, particularly in the context of spectroscopy. It covers the principles of spectroscopy using ultraviolet, visible, and in...This chapter explores the interaction of electromagnetic radiation with matter, particularly in the context of spectroscopy. It covers the principles of spectroscopy using ultraviolet, visible, and infrared radiation. The chapter explains the wave and particle nature of electromagnetic radiation, highlighting its fundamental properties and explaining how matter absorbs or emits photons.
- https://chem.libretexts.org/Bookshelves/Analytical_Chemistry/Instrumental_Analysis_(LibreTexts)/09%3A_Atomic_Absorption_and_Atomic_Fluorescence_Spectrometry/9.02%3A_Atomic_Absorption_InstrumentationAtomic absorption spectrophotometers use the same single-beam or double-beam optics described earlier in Chapter 7, including a source of radiation, a method for introducing the sample (covered in the...Atomic absorption spectrophotometers use the same single-beam or double-beam optics described earlier in Chapter 7, including a source of radiation, a method for introducing the sample (covered in the previous section), a means for isolating the wavelengths of interest, and a way to measure the amount of light absorbed or emitted.
- https://chem.libretexts.org/Bookshelves/Analytical_Chemistry/Molecular_and_Atomic_Spectroscopy_(Wenzel)/1%3A_General_Background_on_Molecular_Spectroscopy/1.3%3A__Instrumental_Setup_of_a_Spectrophotometer/1.3B%3A_MonochromatorsTherefore, as seen in Figure \PageIndex13a, the crest of the wave for A strikes a face of the grating before the crest of the wave for B strikes the adjoining face. The dispersion of radiation w...Therefore, as seen in Figure \PageIndex13a, the crest of the wave for A strikes a face of the grating before the crest of the wave for B strikes the adjoining face. The dispersion of radiation with a prism is non-linear and, for visible radiation, there is less dispersion of the radiation toward the red end of the spectrum.
- https://chem.libretexts.org/Courses/Los_Angeles_Trade_Technical_College/Analytical_Chemistry/2%3A_Analytical_Chemistry_2.0_(Harvey)/11%3A_Spectroscopic_Methods/11.01%3A_Overview_of_SpectroscopyThe focus of this chapter is on the interaction of ultraviolet, visible, and infrared radiation with matter. Because these techniques use optical materials to disperse and focus the radiation, they of...The focus of this chapter is on the interaction of ultraviolet, visible, and infrared radiation with matter. Because these techniques use optical materials to disperse and focus the radiation, they often are identified as optical spectroscopies. For convenience we will use the simpler term spectroscopy in place of optical spectroscopy; however, you should understand that we are considering only a limited part of a much broader area of analytical techniques.
