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high-velocity ray

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См. также в других словарях:

  • high-pressure phenomena — ▪ physics Introduction       changes in physical, chemical, and structural characteristics that matter undergoes when subjected to high pressure. pressure thus serves as a versatile tool in materials research, and it is especially important in… …   Universalium

  • ray — 1. A beam of light, heat, or other form of radiation. The rays from radium and other radioactive substances are produced by a spontaneous disintegration of the atom; they are electrically charged particles or electromagnetic waves of extremely… …   Medical dictionary

  • Ray tracing (physics) — In physics, ray tracing is a method for calculating the path of waves or particles through a system with regions of varying propagation velocity, absorption characteristics, and reflecting surfaces. Under these circumstances, wavefronts may bend …   Wikipedia

  • High speed photography — [ Eadweard Muybridge, first published in 1887.] High Speed Photography is the science of taking pictures of very fast phenomena. In 1948, the Society of Motion Picture and Television Engineers (SMPTE) defined high speed photography as any set of… …   Wikipedia

  • X-ray burster — X ray bursters are a class of binary stars which have periodic outbursts luminous in X rays. They contain a neutron star and an accreting companion.Burst AstrophysicsWhen a star in a binary fills its Roche lobe (either due to being very close to… …   Wikipedia

  • x-ray tube — an electronic tube for producing x rays, essentially a cathode ray tube in which a metal target is bombarded with high energy electrons. [1905 10] * * * ▪ electronics also called  Roentgen tube        evacuated electron tube that produces X rays… …   Universalium

  • X-ray tube — n a vacuum tube in which a concentrated stream of electrons from a cathode strikes a metal target and produces X rays from the side of the tube at right angles in a quantity and intensity that is controlled by the cathode temperature and with a… …   Medical dictionary

  • X-ray tube — /ˌɛks reɪ tjub/ (say .eks ray tyoohb) noun Physics an evacuated tube for the production of X rays in which a heavy metal target is bombarded with a high velocity stream of electrons …  

  • X-ray astronomy — X rays start at 0.008 nm and extend across the electromagnetic spectrum to 8 nm, over which the Earth s atmosphere is opaque. X ray astronomy is an observational branch of astronomy which deals with the study of X ray observation and detection… …   Wikipedia

  • Proper velocity — η.In flat spacetime, proper velocity is the ratio between distance traveled relative to a reference map frame (used to define simultaneity) and proper time τ elapsed on the clocks of the traveling object. It equals the object s momentum p divided …   Wikipedia

  • X-ray binary — Artist s impression of an X ray Binary X ray binaries are a class of binary stars that are luminous in X rays. The X rays are produced by matter falling from one component, called the donor (usually a relatively normal star) to the other… …   Wikipedia

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