X-Ray

From SPACEwiki

X-radiation (composed of X-rays) is a form of electromagnetic radiation. X-rays have a wavelength in the range of 10 to 0.01 nanometers, corresponding to frequencies in the range 30 petahertz to 30 exahertz (3 × 1016 Hz to 3 × 1019 Hz) and energies in the range 120 eV to 120 keV. They are shorter in wavelength than UV 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.

X-rays from about 0.12 to 12 keV (10 to 0.10 nm wavelength), are classified as "soft" X-rays, and from about 12 to 120 keV (0.10 to 0.010 nm wavelength) as "hard" X-rays, due to their penetrating abilities.

Hard X-rays can penetrate solid objects, and their largest use is to take images of the inside of objects in diagnostic radiography and crystallography. As a result, the term X-ray is metonymically used to refer to a radiographic image produced using this method, in addition to the method itself. By contrast, soft X-rays can hardly be said to penetrate matter at all; for instance, the attenuation length of 600 eV (~ 2 nm) x-rays in water is less than 1 micrometer X-rays are a form of ionizing radiation, and exposure to them can be a health hazard.

UW0sUb <a href="http://nrrxtjqniwnd.com/">nrrxtjqniwnd</a>, [url=http://htmjnrmrigtt.com/]htmjnrmrigtt[/url], [link=http://vjinoceziwge.com/]vjinoceziwge[/link], http://gxubonpuhrhb.com/