What is resonant and non resonant scattering?

What is non resonance?

Definition of nonresonant : not resonant: such as. a : not capable of inducing resonance speakers housed in a nonresonant cabinet. b : not relating to or exhibiting resonance nonresonant x-rays.

What is the difference between fluorescence phosphorescence and Raman scattering?

Fluorescence occurs due to real electronic transitions. On the other hand, Raman scattering occurs as a result of virtual electronic-vibrational transitions . More generally, we can say that fluorescence is an absorption or re-emission process and Raman scattering is an inelastic scattering process.

What is non resonance fluorescence?

Nonresonance fluorescence denotes the case where the excitation and fluorescence wavelengths are different. The latter excitation/detection approach offers the advantage of allowing scattered radiation from the excitation beam to be easily separated from the fluorescence.

What is resonance enhancement?

Resonance Raman spectroscopy is a Raman enhancement technique in which the laser excitation frequency is chosen to be close to the frequency of an electronic transition of the sample. … When the laser frequency exactly matches an electronic transition of the sample it is said it be in resonance, shown in Figure 1.

What do you mean by resonance scattering?

noun. Physics. Elastic scattering of a particle by an atomic nucleus at an energy of the incident particle for which the scattering cross-section is large compared with that for adjacent values of the energy; also called resonant scattering.

What is non resonant Raman?

Non-resonance Raman scattering occurs when the radiation interacts with a molecule resulting in polarization of the molecule's electrons. … This provides enough energy to excite the electrons to a higher electronic state.

What is the difference between chemiluminescence and phosphorescence?

Both fluorescence and phosphorescence are based on the ability of a substance to absorb light and emit light of a longer wavelength and therefore lower energy. The main difference is the time in which it takes to do so. … If it lingers, it's phosphorescence. And if it needs activation, it's chemiluminescence.

What is the difference between bioluminescence and phosphorescence?

Bioluminescence is not the same thing as fluorescence, however. … Phosphorescence is similar to florescence, except the phosphorescent light is able to re-emit light for much longer periods of time. Glow-in-the-dark stickers are phosphorescent.