Relativistic Free Particle
There are a number of equations describing relativistic particles: see relativistic wave equations.
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Famous quotes containing the words free and/or particle:
“Under an accumulation of staggerers, no man can be considered a free agent. No man knocks himself down; if his destiny knocks him down, his destiny must pick him up again.”
—Charles Dickens (18121870)
“Each particle is a microcosm, and faithfully renders the likeness of the world.”
—Ralph Waldo Emerson (18031882)