How it unfolded.
The five-minute version
What actually happened.
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.
Reactyour choice is private · counts are aggregate
Captured in time.
Captured before it changed
The web as it looked, the day it happened.
Wayback Machine snapshots of the pages people actually loaded that day. Click any card to open the archive at full size.
Reactyour choice is private · counts are aggregate
Sources & citations.
Sources
Where this came from.
Every claim on this page traces to a public, license-clean source. We don't asterisk well.
By providerWikipedia1
Wikipedia
1 source- 1.Planck's Quantum Of Action
en.wikipedia.org