A heavier mass in a lattice makes it harder to accelerate and decelerate during vibrations. As a result, the system vibrates at a lower angular frequency for the same wave vector. ω−k graph: Optical phonon branch: The frequencies shift downward when mass M increases. Acoustic phonon branch: The graph becomes less steep, reflecting the lower speed of sound (group velocity) in the material due to heavier atoms. If you like it please reply to me and subscribe my channel
Sir Mass M greater than m hone se w-k graph change kyu hora hai thoda physically bhtaye please 🙏
A heavier mass in a lattice makes it harder to accelerate and decelerate during vibrations. As a result, the system vibrates at a lower angular frequency for the same wave vector.
ω−k graph:
Optical phonon branch: The frequencies shift downward when mass
M increases.
Acoustic phonon branch: The graph becomes less steep, reflecting the lower speed of sound (group velocity) in the material due to heavier atoms.
If you like it please reply to me and subscribe my channel