From Wikipedia, the free encyclopedia
X-radiation (composed of
X-rays) is a form of
electromagnetic radiation. X-rays have a
wavelength in the range of 0.01 to 10
nanometers, corresponding to
frequencies in the range 30
petahertz to 30
exahertz (3 × 10
16 Hz to 3 × 10
19 Hz) and energies in the range 120
eV to 120
keV. They are shorter in wavelength than
UV rays and longer than
gamma rays. In many languages, X-radiation is called
Röntgen radiation, after
Wilhelm Conrad Röntgen, who is generally credited as their discoverer, and who had named them X-rays to signify an unknown type of radiation.
[1]:1–2 Correct spelling of X-ray(s) in the English language includes the variants x-ray(s) and X ray(s).
[2] XRAY is used as a communications code word for the letter x.
[3]
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