Word Count : 244

---

For a one-dimensional chain consisting of two different types of atoms of masses (m_1) and (m_2) connected by identical force constants, the statement is false. At the centre of the Brillouin zone, i.e. at wave vector (k = 0), the acoustic and optical branches show distinctly different physical behavior. In the acoustic mode at (k = 0), all atoms in the __________ _________ _________ ________ ________.
_________ _________ ____ ________ _______ _______ ________ ________.
________ ______ ________ ______ _____ ____ ______ _______ ___ ______.
___ ___ _______ ______ _________ _____ _______ ________ _____.
__________ ______ ___ ____ ________ ________ ______ _______ ________.
____ ________ _______ ________ ____ ______ _____ _________ _________ ___ _______.
__________ ______ _________ __________ _____ ____ __________.
___ ______ _________ _________ ______ _________ ___ __________ __________.
___ ______ ___ ______ __________ ____ ____ _______ _______ _____ ________ _________.
______ _________ _________ _________ _________ _________.
_______ __________ ________ ______ _______ ________ ___.
______ ______ ___ ___ ____.
______ _________ __________ ________ ___ ____ _____ _____ __________.
___ ___ ________ _________ _____ ___ ______ ______ ________ ________ _______.
______ _______ _________ ______ ____ __________ ______ ___ ____ ___ _______ _______.
_______ _________ _________ ____ __________ __________ ________ ______.
______ ______ __________ _________ _____ ______ _____ ___.
_______ ____ _________ _______ _________ _______ _____ ________.
________ ___ _______ ______ ________ _________.
________ _____ ____ ________ ____ _________ __________ _____ ________ _____.
________ __________ ________ ___ _______ __________ _____ ______ ______ ____ ______ __________.
______.
Get Full Answer on WhatsApp