Physics
Photon Energy Calculator
Compute photon energy from wavelength or frequency and convert results to joules, electronvolts (eV), and energy per mole of photons. Build wavelength–energy tables and export to CSV.
Photon Energy (E) from Wavelength or Frequency
Use exact constants (h, c, e, Nₐ) to convert between wavelength, frequency, joules, electronvolts, and per-mole photon energy.