Quantum Physics

Planck Energy Calculator

Calculate photon energy from frequency or wavelength using E = hf = hc/λ.
Input
Results
h = 6.626×10⁻³⁴ J·s  ·  c = 3×10⁸ m/s
1 eV = 1.602×10⁻¹⁹ J
Electromagnetic Spectrum Reference
${[["Gamma","< 10 pm","","#ff2060"],["X-ray","0.01–10 nm","","#cc44ff"],["UV","10–400 nm","","#8844ff"],["Visible","400–700 nm","","#4488ff"],["IR","700nm–1mm","","#ff8800"],["Microwave","1mm–1m","","#ff4400"],["Radio","> 1m","","#44ffcc"]].map(([n,r,_,c])=>`
${n}
${r}
`).join("")}