Week4QuizAnswersV3

A optical phonon velocity much less than acoustic

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: S >> υth . 2) Comparing optical and acoustic phonons near the center of the Brillouin zone, which of the following is true? a) Optical phonon velocity much less than acoustic phonon velocity and optical phonon energy much less than acoustic phonon energy. b) Optical phonon velocity much less than acoustic phonon velocity and optical phonon energy much greater than acoustic phonon energy. c) Optical phonon velocity...
View Full Document

Ask a homework question - tutors are online