Planck postulate

Principle of quantum physics

The Planck postulate (or Planck's postulate), one of the fundamental principles of quantum mechanics, is the postulate that the energy of oscillators in a black body is quantized, and is given by E = n h ν , {\displaystyle E=nh\nu \,,} where n {\displaystyle n} is an integer (1, 2, 3, ...), h {\displaystyle h} is the Planck constant, and ν {\displaystyle \nu } (the Greek letter nu) is the frequency of the oscillator. The postulate was introduced by Max Planck in his derivation of his law of black body radiation in 1900. This assumption allowed Planck to derive a formula for the entire spectrum of the radiation emitted by a black body.

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