Q. In order to estimate the specific heat of phonons, the appropriate method to apply would be
(A) Einstein model for acoustic phonons and Debye model for optical phonons
(B) Einstein model for optical phonons and Debye model for acoustic phonons
(C) Einstein model for both optical and acoustic phonons
(D) Debye model for both optical and acoustic phonons
Ans: Einstein model for optical phonons and Debye model for acoustic phonons
![Determine the correctness (or otherwise) of the following Assertion [A] and the Reason [R]](https://www.gkseries.com/blog/wp-content/uploads/2023/10/Determine-the-correctness-or-otherwise-of-the-following-Assertion-A-and-the-Reason-R.jpg)
