Understanding r^t & a: Seeking Clarification on Raman Spectra

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    Raman Spectra
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SUMMARY

The discussion centers on the equation r^t a r = 1, where r^t represents the transpose of the vector r, defined as (x, y, z), and a denotes the diagonalized polarizability tensor. This equation describes an ellipsoid, with the elements of the polarizability tensor determining its size and shape. The mathematical process involves expanding the vector-matrix-vector product to visualize the polarizability effectively, particularly when the polarizability is diagonal, as detailed in Peter F. Bernath's "Spectra of Atoms and Molecules".

PREREQUISITES
  • Understanding of linear algebra, specifically vector and matrix operations.
  • Familiarity with polarizability tensors in molecular spectroscopy.
  • Knowledge of ellipsoids and their mathematical representation.
  • Basic comprehension of Raman spectroscopy principles.
NEXT STEPS
  • Study the mathematical derivation of the vector-matrix-vector product in linear algebra.
  • Explore the properties and applications of polarizability tensors in molecular physics.
  • Research the geometric interpretation of ellipsoids in three-dimensional space.
  • Read Peter F. Bernath's "Spectra of Atoms and Molecules" for deeper insights into Raman spectra.
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Students and researchers in molecular spectroscopy, physicists focusing on polarizability, and anyone interested in the mathematical foundations of Raman spectra analysis.

chobo
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Hi all, I am studying in Raman spectra and I don't know
that what's means r^t a r =1.
r^t is r transpose, r^t=(x,y,z).
And a is diagonalized polarizability tensor.
Whats means that is equal 1?
Just normailzation?
Help me,and so sorry my english is too bad...
 
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ref is
Spectra of atoms and molecules
Peter F. Bernath
ch.8
 
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Dr Claude/
Just defined ellipsoid? That is all?
I mean, what is Matmatical process that's eq.
 
The vector notation is just a shorthand. If you expand the vector-matrix-vector product, you will see that what you get is the equation for an ellipsoid, with the elements of the polarizability tensor determining the size and shape of the ellipsoid. This is clearest when the polarizability is diagonal, as seen in the book. The point of all this is to get a visual representation of the polarizability.
 
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