A HistoryDraft story·29 events

X-ray

Friday Nov 8, 1895 to PresentplaceUnited Kingdom, U.S., Germany, France, Worldwide

X-ray, or X-radiation, is a penetrating form of high-energy electromagnetic radiation. Most X-rays have a wavelength ranging from 10 picometres to 10 nanometres, corresponding to frequencies in the range 30 petahertz to 30 exahertz (3×1015 Hz to 3×1018 Hz) and energies in the range 124 eV to 124 keV.