Sharanya posted an Question
April 05, 2021 • 03:20 am 30 points
  • CSIR NET
  • Physical Sciences

83. in a crystalline solid with n number of unit cells, the number of allowed independent phonon modes of a branch is (a) n (b) 2n c) n (d) n

83. In a crystalline solid with N number of unit cells, the number of allowed independent phonon modes of a branch is (A) N (B) 2N C) N (D) N

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  • Devisharan best-answer

    For N unit cells there are N different value of k for each cell that is N independent mode of oscillation. option A is correct. for More information see M.A. Wahab Solid state physics.

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