Animation of Lattice Waves in a One-Dimensional Diatomic Crystal

This animation shows lattice waves in a one-dimensional diatomic crystal.

To change the wavelength, simply enter at the keyboard any positive integer. (Press the "enter" key at the end of the number.) This number is the wavelength as a multiple number of lattice constants a.

For waves in the optical branch, press the o key.

For waves in the acoustic branch, press the a key.