115th anniversary of the X-Ray discovery (08-11-2010)

X-radiation (composed of X-rays) is a form of electromagnetic radiation. 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 Röntgen radiation, after the German/Dutch scientist Wilhelm Röntgen, who usually is credited as its discoverer, and who had named it X-radiation to signify an unknown type of radiation. Spelling of X-ray(s) in the English language includes the variants x-ray(s), xray(s), and X ray(s). X-rays with high photon energies are called hard X-rays, while those with lower energy are called soft X-rays.