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Raman Spectroscopy

  • July 5, 2020
  • Posted by: OptimizeIAS Team
  • Category: DPN Topics
1 Comment

Subject: Science and tech

Context:

Mumbai-based Tata Memorial Centre has used Raman Spectroscopy to detect RNA viruses present in saliva samples.

Concept:

  • Raman Spectroscopy is a non-destructive chemical analysis technique which provides detailed information about chemical structure, phase and polymorphy, crystallinity and molecular interactions.
  • It is based upon the interaction of light with the chemical bonds within a material.
  • Raman is a light scattering technique, whereby a molecule scatters incident light from a high intensity laser light source. Most of the scattered light is at the same wavelength (or color) as the laser source and does not provide useful information – this is called Rayleigh Scatter.
  • However a small amount of light (typically 0.0000001%) is scattered at different wavelengths (or colors), which depend on the chemical structure of the analyte and this is called Raman Scatter.
Raman Spectroscopy Science and tech

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