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Questions and Answers
Which range of wavelengths do UV-Vis spectrometers operate within?
Which range of wavelengths do UV-Vis spectrometers operate within?
- 200 - 700 nm (correct)
- 400 - 800 nm
- 600 - 900 nm
- 100 - 500 nm
What is a spectrum?
What is a spectrum?
- The energy required for a transition
- The absorption of energy
- The collection of measurement signals of a compound (correct)
- The study of how a compound interacts with different wavelengths
What is the relationship between energy of a photon and its wavelength?
What is the relationship between energy of a photon and its wavelength?
- No relationship
- Directly proportional
- Inversely proportional (correct)
- Indirectly proportional
What is the relationship between energy of a photon and its wavenumber?
What is the relationship between energy of a photon and its wavenumber?
What is the velocity denoted by 'C' in the equation E = hCλ?
What is the velocity denoted by 'C' in the equation E = hCλ?
Which of the following best describes a spectrum in the context of spectroscopy?
Which of the following best describes a spectrum in the context of spectroscopy?
What is the relationship between the energy of a photon and its wavelength?
What is the relationship between the energy of a photon and its wavelength?
What is the relationship between the energy of a photon and its wavenumber?
What is the relationship between the energy of a photon and its wavenumber?
What is the limitation in operation of UV-Vis spectrometers in terms of wavelength range?
What is the limitation in operation of UV-Vis spectrometers in terms of wavelength range?
What does the equation E = hν represent in the context of spectroscopy?
What does the equation E = hν represent in the context of spectroscopy?
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Study Notes
UV-Vis Spectrometers
- UV-Vis spectrometers operate within the wavelength range of 190-1100 nm
Spectroscopy Fundamentals
- A spectrum is a graphical representation of the intensity of radiation versus wavelength or frequency
- The energy of a photon (E) is inversely proportional to its wavelength (λ), as represented by the equation E = hC/λ
- The energy of a photon (E) is directly proportional to its wavenumber (ν), as represented by the equation E = hν
- In the equation E = hC/λ, 'C' denotes the velocity of light
Photon Energy and Wavelength/Wavenumber Relationships
- As the wavelength of a photon decreases, its energy increases
- As the wavenumber of a photon increases, its energy increases
Limitations of UV-Vis Spectrometers
- UV-Vis spectrometers are limited in their operation to a specific wavelength range, typically between 190-1100 nm
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