UV Luminance Spectroscopy Why do fluorescence spectrometers often use double-beam optics? All of these So a reference solution can be used To compensate for power fluctuations in the radiation source To compensate for beam attenuation by the monochromator All of these So a reference solution can be used To compensate for power fluctuations in the radiation source To compensate for beam attenuation by the monochromator ANSWER DOWNLOAD EXAMIANS APP
UV Luminance Spectroscopy In the intersystem crossing All of these a molecule converts its excess energy to light, and emits a photon 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 excess electronic energy to vibrational energy All of these a molecule converts its excess energy to light, and emits a photon 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 excess electronic energy to vibrational energy ANSWER DOWNLOAD EXAMIANS APP
UV Luminance Spectroscopy For a molecule to absorb IR, why must the molecule's vibrations cause fluctuations in the dipole moment of the molecule? 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 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 ANSWER DOWNLOAD EXAMIANS APP
UV Luminance Spectroscopy What is the relationship between wavelength and wave number? Wavenumber - wavelength in nanometers = 1 Wavelength in nanometers x wavenumber = 1 Wavenumber = 1 / wavelength in centimeters None of these Wavenumber - wavelength in nanometers = 1 Wavelength in nanometers x wavenumber = 1 Wavenumber = 1 / wavelength in centimeters None of these ANSWER DOWNLOAD EXAMIANS APP
UV Luminance Spectroscopy Fluorescence occurs when a molecule returns to the electronic ground state from an excited singlet 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 a molecule returns to the electronic ground state from an excited triplet state 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 lowers its vibrational energy 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 None of these ANSWER DOWNLOAD EXAMIANS APP
UV Luminance Spectroscopy Internal conversion is where A molecule converts excess electronic energy to vibrational energy 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 None of these A molecule converts excess electronic energy to vibrational energy 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 None of these ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS