Describe this graph. Prove these four points based on the dispersion equations for both diatomic and monotomic.

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Optic branch
(2a/m)/2
M>m
(2a/M)/2
Acoustic branch
1/a
Describe this graph. Prove these
four points based on the
dispersion equations for both
diatomic and monotomic.
Transcribed Image Text:Optic branch (2a/m)/2 M>m (2a/M)/2 Acoustic branch 1/a Describe this graph. Prove these four points based on the dispersion equations for both diatomic and monotomic.
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