X-Ray

• Light that is so blue humans cannot see it. A band of the spectrum between the ultraviolet and the gamma-ray. Photons of X-ray light are more energetic than photons in the ultraviolet but less energetic than photons in the gamma-ray. X-radiation can go through human skin tissue but is stopped by dense bones. This property thus makes X-rays valuable in medicine.

• The part of the electromagnetic spectrum whose radiation has somewhat greater frequencies and smaller wavelengths than those of ultraviolet radiation. Because x-rays are absorbed by the Earth's atmosphere, x-ray astronomy is performed in space.

• A type of high-energy radiation. In low doses, x-rays are used to diagnose diseases by making pictures of the inside of the body. In high doses, x-rays are used to treat cancer.
   

• a diagnostic test which uses invisible electromagnetic energy beams to produce images of internal tissues, bones, and organs onto film.
   

• Portable x-ray machines may be brought to the baby's bedside in the NICU. X-rays use invisible electromagnetic energy beams to produce images of internal tissues, bones, and organs on film. X-rays are taken for many reasons including checking the placement of catheters and other tubes, looking for signs of lung problems such as hyaline membrane disease, and checking for signs of bowel problems.
   

• High-energy radiation that can be used at low levels to diagnose disease or at high levels to treat cancer.
   

• Electromagnetic radiation of non-nuclear origin within the wavelength interval of 0.1 to 100 Angstroms (between gamma-ray and ultra-violet radiation). X-rays are used in medicine to examine teeth, lungs, bones, and other parts of the human body; they also occur naturally.
   

• (Or x-radiation, Röntgen ray.) Electromagnetic radiation with wavelengths shorter than that of ultraviolet radiation and greater than that of gamma radiation. Discovered accidentally by Röntgen in 1895. The primary mechanism for the production of x- rays is deceleration of a rapidly moving charge upon interaction with matter (bremsstrahlung). The x-ray spectrum from an x-ray tube consists of this continuous spectrum on which are superimposed narrow bands (characteristic radiation) that are a consequence of transitions between electronic energy levels of atoms. No sharp boundary exists between x- and ultraviolet radiation nor between x- and gamma radiation, although the
   

• A class of high energy photon, X-rays have wavelengths of 0.012 to 12 nanometers. Not only are X-rays used for medical imaging (when you break your arm an X-ray machine is used to take a picture of the broken bone), but since black holes, quasars, and other stellar objects emit X-rays, X-Ray Astronomy is actively researched.
   

• In chess, an x-ray is an attack that involves the action of a piece being felt "through" a piece of the opposite color. The following example illustrates this motif: The diagram on the left is from Alekhine-Nestor, Trinidad 1939, with White to move: After 1.Rc8 Qxd7 (1...Rxc8 2.Qe7!) 2.Qf8+!, Black resigned in view of 2...Rxf8 3.Rxf8#. The moves are given in algebraic chess notation.
   

• An X-ray is a form of electromagnetic radiation with a wavelength in the range of 10 nanometers to 100 picometers (corresponding to frequencies in the range 30 PHz to 60 EHz). X-rays are primarily used for diagnostic medical imaging and crystallography. X-rays are a form of ionizing radiation and as such can be dangerous.