EV to HZ

In a vacuum, all electromagnetic waves travel at the speed of light: c = 299, 792, 458 m/s. An energy ( ) can be associated with each region of the EMS using the equation:

where is the frequency and is Planck’s constant which has the value:

The table below lists typical wavelengths, frequencies and energies for different regions of the EMS.

Region Frequency Energy Hard gamma 1 × 10-9 nm 3 × 1026 Hz 1.2 × 1012eV Gamma 1 × 10-6 nm 3 × 1023 Hz 1.2 GeV Gamma/X-ray 0.001 nm 3 × 1019 Hz 12 MeV X-ray 1 nm 3 × 1017 Hz 120 keV 10 nm 3 × 1016 Hz 12 keV Ultraviolet 100 nm 3 × 1015 Hz 1.2 keV Visible (blue) 400 nm 7.5 × 1017 Hz 3.1 eV Visible (red) 700 nm 4.3 × 1017 Hz 1.8 eV 10000 nm 3 × 1013 Hz 0.12 eV Microwave 1 cm 30 GHz 1.2 × 10-4 eV Microwave/Radio 10 cm 3GHz 1.2 × 10-5 eV Radio 100 m 3 MHz 1.2 × 10-8 eV Radio 100 km 3 kHz 1.2 × 10-11 eV