X rays

X rays
X ray X ray, X-ray X-ray([e^]ks"r[=a]`), n. [so called by its discoverer because of its enigmatical character, x being an algebraic symbol for an unknown quantity.] (Physics) originally, any of the rays produced when cathode rays strike upon surface of a solid (as a copper target or the wall of the vacuum tube); now defined as electromagnetic radiation with a wavelength of 0.1 to 10 nanometers. X-rays are noted for their penetration of many opaque substances, as wood and flesh, their action on photographic plates, and their fluorescent effects. They were called {X rays} by their discoverer, W. K. R["o]ntgen, but were also referred to for some time as {Roentgen rays}. The term X-ray has become the most common designation. They also ionize gases, but cannot be reflected, or polarized, or deflected by a magnetic field. They are used in examining objects opaque to visible light, as for imaging bones or other structures inside the human body, and for detecting flaws in metal objects, such as in welds. [Webster 1913 Suppl. +PJC]

The Collaborative International Dictionary of English. 2000.

Игры ⚽ Поможем решить контрольную работу

Look at other dictionaries:

  • Rays Ballpark — (design concept) Location 180 2nd Avenue SE St. Petersburg, Florida 33701 Construction cost $450 million (estimate) …   Wikipedia

  • Rays Engineering — Création 1973 Siège social  Osaka&# …   Wikipédia en Français

  • Rays Resort Apartments Gold Coast (Gold Coast) — Rays Resort Apartments Gold Coast country: Australia, city: Gold Coast (Southport) Rays Resort Apartments Gold Coast Located opposite to the Gold Coast Broadwater, the Rays Resort provides apartments with spectacular views across the… …   International hotels

  • Rays from the Rose Cross — is a Christian esoteric magazine established in June 1913 by Max Heindel, author of The Rosicrucian Cosmo Conception and founder of The Rosicrucian Fellowship; its original name was Echoes from Mount Ecclesia . It is issued bimonthly by The… …   Wikipedia

  • Rays Resort — (Голд Кост,Австралия) Категория отеля: 3,5 звезд Адрес: 106 108 Marine Parade, Southport, Саутпорт …   Каталог отелей

  • rays — informal, chiefly N. Amer. sunlight considered in the context of sunbathing. → ray rays a specified form of non luminous radiation: → ray …   English new terms dictionary

  • Rays de Tampa Bay — Tampa Bay Rays Fondation 1998 …   Wikipédia en Français

  • Rays Engineering — Infobox Company company name = Rays Engineering company company type = foundation = 1973 location = 7 17 5 Nagayoshi Deto Hirano ku Osaka shi, Osaka key people = Masumi Shiba (president) industry = Motorsport Automotive engineering products =… …   Wikipedia

  • Rays (Michael Nesmith album) — Infobox Album Name = Rays Type = Album Artist = Michael Nesmith Released = 2005 Recorded = Genre = Rock Length = Label = Pacific Arts Producer = Michael Nesmith Reviews = * Allmusic (no rating) [http://www.allmusic.com/cg/amg.dll?p=amg… …   Wikipedia

  • Rays of Light — Infobox music DVD Name = Rays of Light Type = Music Video Artist = Madonna Released =1999 Recorded = Format = Genre = Promo compilation Length = 25 mins Label = Warner Music Vision, Maverick, Warner Music UK Producer = Last DVD = Ray of Light… …   Wikipedia

  • Rays Hill Tunnel — Ray s Hill Tunnel is one of three original Pennsylvania Turnpike tunnels which were abandoned (this one in 1968) after two massive realignment projects. The others included the Sideling Hill Tunnel, and further west, the Laurel Hill Tunnel. The… …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”