Hereford, Texas. Hereford (/ËhÉËrfÉrd/ HUR-furd) is a city in and county seat of Deaf Smith County, Texas, United States. The population was 15,370 at the 2010 census. It is the only incorporated locality named Hereford in the country.
X-radiation (composed of X-rays) is a form of electromagnetic radiation. Most X-rays have a wavelength ranging from 0.01 to 10 nanometers, corresponding to frequencies in the range 30 petahertz to 30 exahertz (3Ã1016 Hz to 3Ã1019 Hz) and energies in the range 100 eV to 100 keV. X-ray wavelengths are shorter than those of UV rays and typically longer than those of gamma rays. In many languages, X-radiation is referred to with terms meaning RÃ¶ntgen radiation, after the German scientist Wilhelm RÃ¶ntgen, who usually is credited as its discoverer, and who had named it X-radiation to signify an unknown type of radiation.
What Are X-Rays? And How Does Radiography Work? X-rays (often written x-rays or xrays) are a type of electromagnetic (EM) radiation. The term X-ray is shorthand for X-radiation, so named simply because it was an unknown form of radiation when discovered.