Difference between raman scattering and rayleigh scattering
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The nature of scattering is different in both the cases. Rayleigh scattering is usually an elastic scattering phenomenon whereas Raman scattering is considered as inelastic in general.
Briefly…!
Rayleigh scattering involves the interaction of electromagnetic waves with the particles whose size is smaller when compared to the wavelength of electromagnetic radiation used. The charged particles such as electrons present in atoms of gases, liquids and solids, respond to the oscillating electric field component of the electromagnetic radiation. The interaction results in the movement of these charges particles with a frequency equal to the incident wave frequency and subsequently emits the radiation with the same frequency. Diffraction is one of the example of Rayleigh scattering that we commonly see in most of the laboratories.
Raman scattering results in both the elastic and inelastic scattering of photons. When photons are scattered from an atom or molecule, most of them are scattered elastically (Rayleigh scattering), such that the scattered photons have the same frequency as the incident photons. A small fraction of the scattered photons are scattered inelastically by an excitation, with the scattered photons having a frequency and energy different from the incident photons. During the inelastic scattering process the molecules are usually excited to higher vibrational levels and make transitions to the ground level by emitting photons with a frequency different from the incident photons.
Briefly…!
Rayleigh scattering involves the interaction of electromagnetic waves with the particles whose size is smaller when compared to the wavelength of electromagnetic radiation used. The charged particles such as electrons present in atoms of gases, liquids and solids, respond to the oscillating electric field component of the electromagnetic radiation. The interaction results in the movement of these charges particles with a frequency equal to the incident wave frequency and subsequently emits the radiation with the same frequency. Diffraction is one of the example of Rayleigh scattering that we commonly see in most of the laboratories.
Raman scattering results in both the elastic and inelastic scattering of photons. When photons are scattered from an atom or molecule, most of them are scattered elastically (Rayleigh scattering), such that the scattered photons have the same frequency as the incident photons. A small fraction of the scattered photons are scattered inelastically by an excitation, with the scattered photons having a frequency and energy different from the incident photons. During the inelastic scattering process the molecules are usually excited to higher vibrational levels and make transitions to the ground level by emitting photons with a frequency different from the incident photons.
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