Planck relation (photon energy)

Gives the energy of a single photon from its frequency or wavelength, using the Planck constant. It is used throughout quantum physics and spectroscopy.

E=h\nu=\frac{hc}{\lambda}

What the symbols mean

photon energy (J)
Planck constant (\mathrm{J\cdot s})
frequency of the photon (\mathrm{Hz})
speed of light in vacuum (\mathrm{m/s})
wavelength of the photon (\mathrm{m})

About this formula

  • FieldPhysics
  • TopicQuantum mechanics
  • LevelUniversity
  • Also calledPlanck constant energy of photon, photon energy formula, energy of a photon, Planck-Einstein relation, photon energy wavelength relation, Planck's constant formula
  • SourceWikidata Q122894

Write it in Obsidian

MathLive is a free visual math editor for Obsidian. Run Find a formula, type “planck relation (photon energy)”, and it goes into your note as editable LaTeX. You can also scan formulas from screenshots, PDFs and handwriting.

Related formulas