Planck's Law & Photon Energy Calculator
Compute photon energy, frequency, and wavelength. Features an interactive Electromagnetic Spectrum map.
About
Quantum mechanics establishes that light is quantized into photons, where energy is proportional to frequency. This relationship, defined by Planck's constant, is fundamental to fields ranging from semiconductor physics to astronomy. Errors in these conversions can skew spectroscopic data or photovoltaic efficiency models.
This calculator solves for Photon Energy (E), Frequency (ν), or Wavelength (λ) using precise physical constants. It features an integrated Electromagnetic Spectrum mapper, instantly categorizing radiation into bands (e.g., UV, IR, Visible) to determine its ionizing potential and physical interactions.
Formulas
Photon Energy:
E = h ν = h cλ
Constants:
h ≈ 6.626 × 10-34 J⋅s
c ≈ 2.998 × 108 m/s
Electron-Volts Conversion:
1 eV ≈ 1.602 × 10-19 J
Reference Data
| Spectral Band | Wavelength Range | Frequency Range | Photon Energy (eV) |
|---|---|---|---|
| Gamma Rays | < 10 pm | > 30 EHz | > 100 keV |
| X-Rays | 10 pm - 10 nm | 30 PHz - 30 EHz | 100 eV - 100 keV |
| Ultraviolet (UV) | 10 nm - 400 nm | 750 THz - 30 PHz | 3 eV - 100 eV |
| Visible Light | 400 nm - 700 nm | 430 THz - 750 THz | 1.7 eV - 3 eV |
| Infrared (IR) | 700 nm - 1 mm | 300 GHz - 430 THz | 1 meV - 1.7 eV |
| Microwave | 1 mm - 1 m | 300 MHz - 300 GHz | 1 μeV - 1 meV |
| Radio Waves | > 1 m | < 300 MHz | < 1 μeV |