In physics, a free particle is a particle that, in some sense, is not bound by an external force, or equivalently not in a region where its potential energy varies. In classical physics, this means the particle is present in a "field-free" space. In quantum mechanics, it means a region of constant potential, usually set to zero in the region of interest since potential can be arbitrarily set to zero at any point (or surface in three dimensions) in space.
Read more about Free Particle: Classical Free Particle, Relativistic Free Particle
Famous quotes containing the words free and/or particle:
“Now, aged 50, I’m just poised to shoot forth quite free straight & undeflected my bolts whatever they are.”
—Virginia Woolf (1882–1941)
“The way to learn German, is, to read the same dozen pages over and over a hundred times, till you know every word and particle in them, and can pronounce and repeat them by heart.”
—Ralph Waldo Emerson (1803–1882)