ehrenfest
Mar21-08, 11:24 AM
1. The problem statement, all variables and given/known data
This question refers to Kittel's solid-state physics book.
Above equation (23), Kittel says that a cutoff frequency \omega_D is determined by (19) as" and then he gives equation (23). I have absolutely no idea where equation (23) comes from.
2. Relevant equations
3. The attempt at a solution
This question refers to Kittel's solid-state physics book.
Above equation (23), Kittel says that a cutoff frequency \omega_D is determined by (19) as" and then he gives equation (23). I have absolutely no idea where equation (23) comes from.
2. Relevant equations
3. The attempt at a solution