Question

‘Raman Shift’ depends on.
A. Incident wavelength
B. Incident intensity
C. Resolving power of the spectrograph used
D. Molecular energy levels of the scatterer.

Answer 1

Hint:The Raman shift is the difference in energy in between incident (laser) light and the diffuse (detected) light. Typically the Raman shift is expressed in Wavelength.


Complete step by step solution:
Raman shift: The Raman shift is the difference in energy in between incident (laser) light and the diffuse (detected) light. This discrepancy is therefore only related to the energetic properties of the observed molecular motions and thus independent of the laser wavelength. Typically the Raman shift is expressed in Wavenumbers.

Raman shifts are deduced in units of wavenumber (${\rm{c}}{{\rm{m}}^{ - 1}}$) and are defined by: $D\; = {\rm{ }}\left( {{\rm{1/}}{{\rm{l}}_{\rm{o}}} - {\rm{1/}}{{\rm{l}}_{\rm{R}}}} \right)$, where $D$ is the Raman Shift, ${{\rm{l}}_{\rm{o}}}$ is the laser wavelength, and ${{\rm{l}}_{\rm{R}}}$ is the Raman radiation wavelength.

Wavelength: In mechanics, the wavelength is the angular time of a periodic wave the range over which the form of the wave replicates. If the wavelength of the incident is $\lambda $, the stop potential is $3{V_{\rm{0}}}$. If the wavelength of the event is $2\lambda $ so the probability for stoppage is ${V_{\rm{0}}}$.

Intensity: In physics, radiant energy strength is the power transmitted per unit area, where the field is determined on the plane perpendicular to the way the energy is propagated. It has units of Watts per square meter in the SI system. Incident intensity is defined as the feature of incident radiation (because it is the cumulative intensity from all directions that affects a point).

Resolving power of the spectrograph: A spectrograph’s spectral resolution, or, more broadly, a frequency spectrum, is a test of his ability to solve electromagnetic spectrum characteristics. It is usually referred to as $\Delta \lambda $ and is closely related to the spectrograph's solving power, defined as $R = c\Delta v$.

Molecular energy levels of the scatterer: The concept is widely used for the energy levels of electrons in atoms, ions, or molecules- connected by the nucleus' electric field. May also apply to nuclei energy levels or to vibrational or rotational molecular energy levels.
Hence, ‘Raman Shift’ depends on an incident wavelength only.


Note: Raman Shift: The Raman shift is the differential in energy among incident light (beam) and the diffuse light (observed). The Raman shift is usually reflected in Wavelength. In physics, the wavelength is the angular time of a periodic wave the range over which the form of the wave replicates.