Photon Energy Calculator
Wavelength
Unit
Photon energy is the energy carried by a single light photon. Higher frequency (shorter wavelength) = more energy per photon. X-rays carry thousands of times more energy than visible light.
- 1E = hf (Planck's equation)
- 2E = hc/λ (from wave equation c = fλ)
- 3h = 6.626×10⁻³⁴ J·s; c = 3×10⁸ m/s
- 4Convert to eV: 1 eV = 1.6×10⁻¹⁹ J
λ = 630 nm (red light)=E = hc/λ = 3.14×10⁻¹⁹ J = 1.96 eV
| Type | Wavelength | Energy (eV) |
|---|---|---|
| Visible (red) | 700nm | 1.77 |
| Visible (green) | 550nm | 2.25 |
| Visible (violet) | 400nm | 3.10 |
| UV light | 200nm | 6.20 |
| X-ray | 0.1nm | 12,400 |
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