UV Luminance Spectroscopy For a molecule to absorb IR, why must the molecule's vibrations cause fluctuations in the dipole moment of the molecule? All of these Because for absorption to occur, the radiation must interact with the electric field caused by changing dipole moment Because a change in dipole moment lowers the energy required for electronic transitions Because fluctuations in the dipole moment allow the molecule to deform by bending and stretching All of these Because for absorption to occur, the radiation must interact with the electric field caused by changing dipole moment Because a change in dipole moment lowers the energy required for electronic transitions Because fluctuations in the dipole moment allow the molecule to deform by bending and stretching ANSWER DOWNLOAD EXAMIANS APP
UV Luminance Spectroscopy Internal conversion is where None of these the spin of an excited electron reverses, changing the state of the molecule (from singlet state to triplet state or vice versa) A molecule converts its excess energy to light, and emits a photon A molecule converts excess electronic energy to vibrational energy None of these the spin of an excited electron reverses, changing the state of the molecule (from singlet state to triplet state or vice versa) A molecule converts its excess energy to light, and emits a photon A molecule converts excess electronic energy to vibrational energy ANSWER DOWNLOAD EXAMIANS APP
UV Luminance Spectroscopy What is the relationship between wavelength and wave number? None of these Wavenumber = 1 / wavelength in centimeters Wavenumber - wavelength in nanometers = 1 Wavelength in nanometers x wavenumber = 1 None of these Wavenumber = 1 / wavelength in centimeters Wavenumber - wavelength in nanometers = 1 Wavelength in nanometers x wavenumber = 1 ANSWER DOWNLOAD EXAMIANS APP
UV Luminance Spectroscopy Fluorescence occurs when a molecule lowers its vibrational energy by losing it's excess energy as a photon None of these a molecule returns to the electronic ground state from an excited singlet state by losing it's excess energy as a photon a molecule returns to the electronic ground state from an excited triplet state by losing it's excess energy as a photon a molecule lowers its vibrational energy by losing it's excess energy as a photon None of these a molecule returns to the electronic ground state from an excited singlet state by losing it's excess energy as a photon a molecule returns to the electronic ground state from an excited triplet state by losing it's excess energy as a photon ANSWER DOWNLOAD EXAMIANS APP
UV Luminance Spectroscopy In the intersystem crossing a molecule converts excess electronic energy to vibrational energy All of these the spin of an excited electron reverses, changing the state of the molecule (from singlet state to triplet state or vice versa) a molecule converts its excess energy to light, and emits a photon a molecule converts excess electronic energy to vibrational energy All of these the spin of an excited electron reverses, changing the state of the molecule (from singlet state to triplet state or vice versa) a molecule converts its excess energy to light, and emits a photon ANSWER DOWNLOAD EXAMIANS APP
UV Luminance Spectroscopy Why phosphorescence measurements are usually made at a low temperature? To prevent thermal degradation of the phosphorescent species To increase the efficiency of the detector To decease the efficiency of detector To promote phosphorescence by slowing the rate of radiationless transfer processes To prevent thermal degradation of the phosphorescent species To increase the efficiency of the detector To decease the efficiency of detector To promote phosphorescence by slowing the rate of radiationless transfer processes ANSWER DOWNLOAD EXAMIANS APP
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