Point particle
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A point particle, ideal particle or point-like particle is an idealization used in physics. Its defining feature is negligible spatial extension or a body whose own rotation is irrelevant. A point par
Scalar potential of a point charge shortly after exiting a dipole magnet, moving left to right.
Uncertainty principle
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The uncertainty principle, also known as Heisenberg's indeterminacy principle, is a fundamental concept in quantum mechanics. It states that there is a limit to the precision with which certain pairs
Point particle
…is usually no concept of rotation of point particles about their "center". In quantum mechanics, the concept of a point particle is complicated by the Heisenberg uncertainty principle, because even an elementary particle, with no known internal structure, occupies a nonzero volume. There is nevertheless a distinction between elementary…
Canonical commutation rule for position q and momentum p variables of a particle, 1927. pq − qp = h/(2πi). Uncertainty principle of Heisenberg, 1927.
German physicist Werner Heisenberg (1901–1976), who introduced Uncertainty Principle in 1927
Werner Heisenberg and Niels Bohr