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Kindly answer both questions 1 abd 2 fully. Question 1) Find the dispersion relation for one...

Kindly answer both questions 1 abd 2 fully.

Question 1) Find the dispersion relation for one dimensional diatomic lattice?
(definition and difference of optical branch and acoustical branch)

Question 2) Find the displacement u(x,t) for one dimensional diatomic lattice?

Kindly answer both questions 1 abd 2 fully.

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