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Planck-Einstein relation

An electromagnetic wave can only emit energy in quanta of

E = h ν



The Planck-Einstein relation for a wave reads

E = h ν


    h Planck constant
    ν Frequency 


Alternative 1

For the angular frequency it is

E = h ω


    ℏ Reduced Planck constant
    ω Angular frequency



In 1900, the German physicist Max Planck came up with the hypothesis of the quantization of energy. In 1905, German physicist Albert Einstein explained the photoelectric effect with it. In honor of their joint contributions, this relation is now often referred to as the Planck-Einstein relation.

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