| 释义 |
backscatter
back·scat·ter B0014200 (băk′skăt′ər)n.1. The deflection of radiation or particles by electromagnetic or nuclear forces through angles greater than 90° to the initial direction of travel.2. The radiation or particles so deflected.
back′scat′ter v.backscatter (ˈbækˌskætə) n1. (General Physics) the scattering of particles or radiation, such as sound waves, X-rays, or alpha-particles, by the atoms of the medium through which they pass, in the backward direction2. (General Physics) the radiation or particles so scattered3. (Military) a technique whereby very long-range radars locate targets hidden by the curvature of the earth. Radar beams are reflected off the underside of the troposphere onto the target and the return beams, similarly reflected, are measuredvbto scatter in this wayback•scat•ter (ˈbækˌskæt ər)
n. 1. the deflection of radiation by scattering in a direction opposite to the direction of incidence. 2. radiation scattered in this manner. [1955–60] backscatterRefers to a portion of the laser energy that is scattered back in the direction of the seeker by an obscurant. See also laser.Thesaurus| Verb | 1. |  backscatter - scatter (radiation) by the atoms of the medium through which it passesnatural philosophy, physics - the science of matter and energy and their interactions; "his favorite subject was physics"disperse, scatter, break up - cause to separate; "break up kidney stones"; "disperse particles" |
Translationsbackscatter
backscatter Backscatter allows communication within the skip zone. Normally, station within skip zone cannot hear transmitting station. In this case Y cannot hear station X. Station, however, Z can hear station X by normal ionospheric propagation. On the other hand, when backscatter is strong enough station Y can hear station X, even though Y is within the skip zone.i. A form of ionospheric propagation of electromagnetic waves via the E and F layers. These layers are highly ionized and have properties of reflecting electromagnetic waves back to the earth. Normally, almost all electromagnetic signals are returned to the earth at roughly equivalent angles of incidence. However, some amount of electromagnetic energy is scattered in all directions. Some energy may be reflected back toward the transmitting station into the skip zone. A receiving station within this skip zone is thus able to receive the transmission. Also called echo.
ii. In radar, the portion of the microwave energy scattered by the terrain surface directly back toward the antenna.backscatter
backscatter [bak´skat″er] in radiology, radiation deflected by scattering processes at angles greater than 90 degrees to the original direction of the beam of radiation.back·scat·ter (bak'skat-ĕr), Secondary radiation deflected more than 90° from the primary beam. See: scattered radiation. backscatter Cytometry
One of two parameters measured in flow cytometry, which is detected at a 90º angle to a laser light beam and corresponds to the fluorescence of individual cells or intracellular components stained with rhodamine- or isothiocyanate-labelled monoclonal antibodies.
Nuclear physics
Electromagnetic radiation—usually understood to be photons, but also ultrasonic waves, etc.—that reflects > 90º from the source, or back in the general direction of a source.back·scat·ter (bak'skat-ĕr) Deflection of diagnostic radiation at angles exceeding 90 degrees to the direction of the beam. backscatter
Related to backscatter: backscatter spam, backscatter radiationWords related to backscatterverb scatter (radiation) by the atoms of the medium through which it passesRelated Words- natural philosophy
- physics
- disperse
- scatter
- break up
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