---
title: "Planck's Quantum Theory Presented"
year: 1900
country: "Germany"
canonical: "https://recap.at/1900/planck-quantum-theory"
slug: "planck-quantum-theory"
recapType: "global_event"
startDate: "1900-01-01"
---

# Planck's Quantum Theory Presented

> Max Planck's blackbody radiation solution introduced the quantum hypothesis, fundamentally altering physics and launching the 20th-century scientific revolution.

## Summary

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.

## Sources

- [Planck's Quantum Of Action](https://en.wikipedia.org/wiki/Planck_constant) - Wikipedia

---
Canonical: https://recap.at/1900/planck-quantum-theory