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Questions and Answers
Which radiant source has a positive temperature coefficient and does not require preheating?
Which radiant source has a positive temperature coefficient and does not require preheating?
- Nernst Glower
- The Globar (correct)
- Coiled wire sources
- None of the above
What is the temperature of the Nernst Glower radiant source?
What is the temperature of the Nernst Glower radiant source?
- 2,200 K
- 1,500 K
- 1,800 K (correct)
- 2,000 K
Which radiant source provides greater photon output than Nernst glower below 1700 cm-1 for the same energy consumption?
Which radiant source provides greater photon output than Nernst glower below 1700 cm-1 for the same energy consumption?
- Nernst Glower
- The Globar (correct)
- Coiled wire sources
- None of the above
Which type of radiant source requires preheating before it functions properly?
Which type of radiant source requires preheating before it functions properly?
In an FTIR instrument, what does the interferometer do?
In an FTIR instrument, what does the interferometer do?
Which type of IR analysis method uses lasers to provide precise wavelength measurements?
Which type of IR analysis method uses lasers to provide precise wavelength measurements?
What is the range of wavelengths for Mid IR (MIR) spectroscopy?
What is the range of wavelengths for Mid IR (MIR) spectroscopy?
What property of a molecule makes it 'IR active' in IR spectroscopy?
What property of a molecule makes it 'IR active' in IR spectroscopy?
How can you tell if a molecule can absorb IR radiation?
How can you tell if a molecule can absorb IR radiation?
Which region of IR spectroscopy is associated with the probe of primary vibrational modes within a molecule?
Which region of IR spectroscopy is associated with the probe of primary vibrational modes within a molecule?
In terms of energy transitions, what distinguishes UV-Vis spectroscopy from IR spectroscopy?
In terms of energy transitions, what distinguishes UV-Vis spectroscopy from IR spectroscopy?
What is the characteristic that determines if a molecule can absorb IR radiation like CO2?
What is the characteristic that determines if a molecule can absorb IR radiation like CO2?
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