# Canonical recap data for Planck's Quantum Theory Presented (1900)
# Source: https://recap.at/1900/planck-quantum-theory
# Format: YAML 1.2 (UTF-8). Generated at request time.
slug: planck-quantum-theory
canonicalUrl: "https://recap.at/1900/planck-quantum-theory"
title: Planck's Quantum Theory Presented
subtitle: Max Planck's blackbody radiation solution introduced the quantum hypothesis, fundamentally altering physics and launching the 20th-century scientific revolution.
recapType: global_event
eventStatus: concluded
startDate: 1900-01-01
datePrecision: year
year: 1900
decade: 1900
country:
name: Germany
slug: germany
summaryShort: "The Planck constant, or Planck's constant, denoted by , is a fundamental physical constant of foundational importance in quantum mechanics: a photon's energy is equal to its frequency multiplied by the Planck constant, and a particle's momentum is equal to the wavenumber of the associated matter wave multiplied by the "
summaryLong: "The Planck constant, or Planck's constant, denoted by , is a fundamental physical constant of foundational importance in quantum mechanics: a photon's energy is equal to its frequency multiplied by the Planck constant, and a particle's momentum is equal to the wavenumber of the associated matter wave multiplied by the Planck constant."
heroImageUrl: "https://upload.wikimedia.org/wikipedia/commons/thumb/1/16/Max_Planck_Wirkungsquantums_20050815.jpg/1280px-Max_Planck_Wirkungsquantums_20050815.jpg"
heroImageCredit: Wikipedia · "Planck constant"
importance: 86
sourceConfidence: 75
keyFacts: []
timeline: []
sources:
- url: "https://en.wikipedia.org/wiki/Planck_constant"
  title: Planck's Quantum Of Action
  provider: Wikipedia
related: []
categories:
- tech-launch
metaDescription: "The Planck constant, or Planck's constant, denoted by , is a fundamental physical constant of foundational importance in quantum mechanics: a photon's energy is"
wikidataQid: Q122894
archiveSnapshots:
- url: "https://web.archive.org/web/20260528082155/https://en.wikipedia.org/wiki/Planck_constant"
  capturedAt: 2026-05-28
  label: Planck's Quantum Of Action
  originalUrl: "https://en.wikipedia.org/wiki/Planck_constant"
taxonomy:
domain: scientific
eventTypes:
- research_publication
canonicalClasses:
- discovery
- creation
impactRadius: global
velocity: gradual
predictability: emergent
intentionality: planned
domainCoupling: single_domain
lifecycleClass: birth
