ψ

Definition from Wiktionary, the free dictionary
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See also: Ψ, , ѱ, and Ѱ
Greek lc psi.svg
ψ U+03C8, ψ
GREEK SMALL LETTER PSI
χ
[U+03C7]
Greek and Coptic ω
[U+03C9]

Translingual[edit]

Symbol[edit]

ψ

  1. (quantum mechanics) a wavefunction
  2. (electrical engineering) Electric flux.

Usage notes[edit]

Some texts use Ψ (uppercase) for the actual wavefunction that appears in the time-dependent Schrödinger equation, and ψ (=ΨeiEt/ħ) (lowercase) for the time-independent spatial wave function that may exist for stationary states (and which then appears in the time-independent Schrödinger equation), but this distinction is not always observed. Otherwise, the distinction may be made by providing the arguments.

See also[edit]


Greek[edit]

Letter[edit]

ψ (ps) (lowercase, uppercase Ψ)

  1. The lower case letter psi (ψι), the 23rd letter of the modern Greek alphabet.
Derived terms[edit]
  • ψ΄ (ps΄, 700)
  • ͵ψ (͵ps, 700,000)

See also[edit]