Exercise: Uv Luminance Spectroscopy

Questions for: Uv Luminance Spectroscopy

Why must the radiation source for fluorescence spectrometry be more powerful than for absorption spectroscopy?
A:
Because the magnitude of the output signal is proportional to the power of the incident radiation
B:
Because the sample won't fluoresce if the incident radiation is of low power
C:
To allow for scattering by the sample
D:
None of the above
Answer: A
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In the intersystem crossing
A:
the spin of an excited electron reverses, changing the state of the molecule (from singlet state to triplet state or vice versa)
B:
a molecule converts its excess energy to light, and emits a photon
C:
a molecule converts excess electronic energy to vibrational energy
D:
all of the above
Answer: A
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What is the relationship between wavelength and wave number?
A:
Wavenumber = 1 / wavelength in centimeters
B:
Wavenumber - wavelength in nanometers = 1
C:
Wavelength in nanometers x wavenumber = 1
D:
None of the above
Answer: A
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