Wavelength to Energy
E = hc / λ
Instructions
Enter wavelength in nanometers. The calculator outputs photon energy in joules and electronvolts.
Formula
E = hc / λ
Common Questions
Visible range?
Visible light is ~380–750 nm (≈ 3.26–1.65 eV).
E = hc / λ
Enter wavelength in nanometers. The calculator outputs photon energy in joules and electronvolts.
E = hc / λ
Visible light is ~380–750 nm (≈ 3.26–1.65 eV).