# Category:Definitions/Planck's Constant

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This category contains definitions related to Planck's Constant.

**Planck's constant** is the physical constant $h$ which defines the quantum nature of energy and relates the energy of a photon to its frequency.

Thus:

- $E = \dfrac h f$

where:

- $E$ denotes the energy of a photon
- $f$ denotes the frequency of that photon
- $h$ denotes
**Planck's constant**.

It is used for describing the behaviour of particles and waves at an atomic scale.

\(\ds h\) | \(=\) | \(\ds 6 \cdotp 62607 \, 015 \times 10^{-34}\) | joule seconds | \(\quad\) This sequence is A003676 in the On-Line Encyclopedia of Integer Sequences (N. J. A. Sloane (Ed.), 2008). | ||||||||||

\(\ds \) | \(=\) | \(\ds 6 \cdotp 62607 \, 015 \times 10^{-27}\) | erg seconds |

## Source of Name

This entry was named for Max Karl Ernst Ludwig Planck.

## Subcategories

This category has only the following subcategory.

### R

## Pages in category "Definitions/Planck's Constant"

The following 7 pages are in this category, out of 7 total.