A one- dimensional linear atomic chain contains two types ofatoms of masses m1 and m2 (where m2 > m1), arrangedalternately. The distance between successive atoms is thesame. Assume that the harmonic approximation is valid. At thefirst Brillouin zone boundary, which statement is correct? (2marks)Select one:O A. The atoms of mass m1 are at the rest in the optical mode, while they vibrate in theacoustical modeO B. Both types of atoms vibrate with equal amplitudes in the optical as well as acousticalmodeO C. The atoms with mass m2 are at rest in the optical mode, while they vibrate in theacoustical modeD. Both types of atoms vibrate, but with unequal, non-zero amplitudes in the optical aswell as acoustical mode

Option C is correct. In acoustic branch at the zone boundary only heavier atoms oscillate while in…

A one- dimensional linear atomic chain contains two types of atoms of masses m1 and m2 (where m2 > m1), arranged alternately. The distance between successive atoms is the same. Assume that the harmonic approximation is valid. At the first Brillouin zone boundary, which statement is correct? (2 marks)

A one- dimensional linear atomic chain contains two types of atoms of masses m1 and m2 (where m2 > m1), arranged alternately. The distance between successive atoms is the same. Assume that the harmonic approximation is valid. At the first Brillouin zone boundary, which statement is correct? (2 marks)

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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