IEVref: 113-05-07 ID: Language: en Status: In preparation Term: Planck constant Synonym1: Synonym2: Synonym3: Symbol: h Definition: fundamental physical constant the value of which is set to exactly 6,626 070 15 × 10−34 J s, where the joule (J) is defined in IEV 113-03-46 and the second (s) is defined in IEV 112-02-04 Note 1 to entry: The Planck constant governs, among others, the relation between the frequency f of electromagnetic radiation and the energy E = hf of the corresponding photons. Publication date: 2020-12 Source: SI Brochure, 9th edition, 2019, 2.2, modified – The definition in the SI Brochure has been revised to comply with the IEV rules. Replaces: 113-05-07:2011-04 Internal notes: CO remarks: TC/SC remarks: VT remarks: Domain1: Domain2: Domain3: Domain4: Domain5: