Phonons are sound particles or quantized vibrations of atoms in solid materials. The Debye model, a theory introduced by ...

Almost everything is made of particles. Particles can be atoms, molecules or ions. Particles behave differently in solids, liquids and gases. The particle model explains the differences between solids ...

Why do avalanches start to slide? And what happens inside the "pile of snow?" If you ask yourself these questions, you are ...