Hi all, Im studying in Raman spectra and I dont know(adsbygoogle = window.adsbygoogle || []).push({});

that whats 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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# I What is <r|a|r>

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