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Reflection which reverses the direction of a wave, particle, or signal
In physics, backscatter (or backscattering) is the reflection of waves, particles, or signals back to the direction from which they came. It is usually
Backscatter
Topics referred to by the same term
Backscatter is the reflection of waves, particles or signals. The term may also refer to: Backscatter X-ray, a new type of imaging technology Backscatter
Backscatter_(disambiguation)
Advanced X-ray imaging technology
Backscatter X-ray is an advanced X-ray imaging technology. Traditional X-ray machines detect hard and soft materials by the variation in x-ray intensity
Backscatter_X-ray
Optical phenomenon in photography
In photography, backscatter (also called near-camera reflection) is an optical phenomenon resulting in typically circular artifacts on an image, due to
Backscatter_(photography)
Incorrectly automated bounce messages
Backscatter (also known as outscatter, misdirected bounces, blowback or collateral spam) is incorrectly automated bounce messages sent by mail servers
Backscatter_(email)
Device which detects objects in or around a person's body
wave scanners do not generate ionizing radiation. X-ray-based scanners Backscatter X-ray scanners use low dose radiation for detecting suspicious metallic
Full_body_scanner
Ambient backscatter uses existing radio frequency signals, such as radio, television and mobile telephony, to transmit data without a battery or power
Ambient_backscatter
Scanning electron microscopy technique
Electron backscatter diffraction (EBSD) is a scanning electron microscopy (SEM) technique used to study the crystallographic structure of materials. EBSD
Electron backscatter diffraction
Electron_backscatter_diffraction
Scattering of a radiation wave as it travels through a complex medium
In physics, coherent backscattering is observed when coherent radiation (such as a laser beam) propagates through a medium which has a large number of
Coherent_backscattering
Art and practice of creating images by recording light
mm equivalent focal length Abbreviations list Angle of view Aperture Backscatter Black and white Chromatic aberration Circle of confusion Clipping Color
Photography
Analytical technique to determine structure and composition of materials
Rutherford backscattering spectrometry (RBS) is an analytical technique used in materials science. Sometimes referred to as high-energy ion scattering
Rutherford backscattering spectrometry
Rutherford_backscattering_spectrometry
Portrayal of sexual subject matter
mm equivalent focal length Abbreviations list Angle of view Aperture Backscatter Black and white Chromatic aberration Circle of confusion Clipping Color
Pornography
Type of cyber-attack
These response packets are known as backscatter. If the attacker is spoofing source addresses randomly, the backscatter response packets from the victim
Denial-of-service_attack
Strength of an object's radar echo
section (NRCS), also known as differential scattering coefficient or radar backscatter coefficient, denoted σ0 or σ0 ("sigma nought"), which is the average
Radar_cross_section
Type of electron microscope
Scintillator Backscattered Electron Detectors, the Backscattered-to-Secondary Electron Conversion Detector, and the Solid State Diode Detector. Backscattered electrons
Scanning_electron_microscope
Long distance radar technology
using a chirp transmitter. The most common type of OTH radar, OTH-B (backscatter), uses skywave or "skip" propagation, in which shortwave radio waves
Over-the-horizon_radar
Nanoscale orientation mapping method
Kikuchi diffraction (TKD), also sometimes called transmission electron backscatter diffraction (t-EBSD), is a method for orientation mapping at the nanoscale
Transmission Kikuchi diffraction
Transmission_Kikuchi_diffraction
Backscattering cross section is a property of an object that determines what proportion of incident wave energy is scattered from the object, back in the
Backscattering_cross_section
Automated message from an email system
"returned" to the third party instead of the spammer. This is called backscatter. Had the library.example mail server known that the message would be
Bounce_message
Optical effect
proposed for this observational phenomenon: shadow hiding and coherent backscatter. The phase angle is defined as the angle between the observer, the observed
Opposition_surge
Rewriting an email message sender address
supply the criteria should not make any bounce message classifiable as backscatter, although some people mistakenly think it should. Open relays and forwarders
Sender_Rewriting_Scheme
Unsolicited messages sent by email
appears blank, when in fact it uses HTML code to download other files. Backscatter is a side-effect of email spam, viruses, and worms. It happens when email
Email_spam
Meteorological optical phenomenon
is because the atmospheric light scattering that makes them visible (backscattering) is larger for low angles to the horizon than most other angles. Anticrepuscular
Anticrepuscular_rays
Type of microscope with electrons as a source of illumination
the energy of the primary beam. Backscattered electrons can be used for both imaging and to form an electron backscatter diffraction (EBSD) image, the latter
Electron_microscope
US Air Force radar station in Oregon
engineers in the early 1970s who were developing an over the horizon backscatter radar (OTH-B) system. The system was based on a frequency modulation/continuous
Christmas Valley Air Force Station
Christmas_Valley_Air_Force_Station
Quantitative study of the energy spectra of gamma-ray sources
first peak left of the Compton edge), the so-called backscatter peak. The detailed shape of backscatter peak structure is influenced by many factors, such
Gamma_spectroscopy
Neutron backscattering is one of several inelastic neutron scattering techniques. Backscattering from monochromator and analyzer crystals is used to achieve
Neutron_backscattering
Manufacturer of metal detectors and X-ray machines
its revenue during 2005–2007. Rapiscan manufactures a controversial backscatter X-ray system for screening airport passengers, the Rapiscan Secure 1000
Rapiscan_Systems
crosslinking (for negative resists) come from electron forward scattering and backscattering. The forward scattering process is due to electron-electron interactions
Proximity effect (electron beam lithography)
Proximity_effect_(electron_beam_lithography)
Science of measurement and description of features which affect maritime activities
position of origin for each of the backscatter amplitudes in the output data set. Those positions are based on the backscatter measurements themselves and not
Hydrographic_survey
Nerve sensors used in brain-computer interfaces
impossible to create a functional transmitter in the sensor itself. Thus backscatter communication, adopted from radio frequency identification (RFID) technologies
Neural_dust
Process of removing land mines
off a mine, and it can only detect mines near the surface. In X-ray backscatter, an area is irradiated with X-rays (photons with wavelengths between
Demining
Proposed sixth-generation mobile telecommunications technology
objects, and equipment across a wide range of contexts. 6G will also use Backscatter Communication for Ambient IoT devices. "Recommendation ITU-R M.2160-0"
6G
Anomaly in digital graphics or imagery
fringing Motion blur Near-camera reflection, visual artifacts caused by the backscatter of light by unfocused particles In microscopy, an artifact is an apparent
Visual_artifact
American weather satellite (2005–2025)
French/CNES-provided improved Argos Data Collection System (Argos DCS-2) The Solar Backscatter Ultraviolet Spectral radiometer (SBUV/2) The Advanced Microwave Sounding
NOAA-18
Measurement for ionizing radiation
plate sources usually have a significant backscatter, whereas alpha plate sources usually have no backscatter. However alpha particles are easily attenuated
Counts_per_minute
American x-ray equipment manufacturer
leading inventor/scientist for the company, including inventing the backscatter technology, which enabled the detection of plastic explosives, he also
American Science and Engineering
American_Science_and_Engineering
Atmospheric optical phenomenon
direction when uniformly sized water droplets in clouds refract and backscatter sunlight. The phenomenon can appear on any misty mountainside, cloud
Brocken_spectre
Meteorological instrumentation
geophysical model function (GMF) which relates wind and backscatter. Over the ocean, the radar backscatter results from scattering from wind-generated capillary-gravity
Scatterometer
Optical effect of interplanetary dust reflections
faintly bright spot in the night sky centered at the antisolar point. The backscatter of sunlight by interplanetary dust causes this optical phenomenon, being
Gegenschein
British materials scientist and engineer
research interests are in micromechanics, deformation, strain and electron backscatter diffraction (EBSD). In 2014 he was awarded the Silver Medal of the Institute
Ben_Britton
Small radar mapper on the Lunar Reconnaissance Orbiter
An example Mini-RF total radar backscatter image taken in the 12.6 cm band. It shows a fresh lunar impact crater with an ejecta blanket surrounding it
Mini-RF
Imaging technique using radiation
techniques are used in airport security, (where "body scanners" generally use backscatter X-ray). To create an image in conventional radiography, a beam of X-rays
Radiography
Reserved part of radio spectrum
Amateur radio frequency allocation is done by national telecommunication authorities. Globally, the International Telecommunication Union (ITU) oversees
Amateur radio frequency allocations
Amateur_radio_frequency_allocations
Electron Backscatter Diffraction software
open-source MATLAB package specifically designed for the analysis of electron backscatter diffraction (EBSD) data, which are widely used to analyse the crystallographic
MTEX
Goods inspection system
dose of radiation to potential stowaways. Dual-energy X-ray radiography Backscatter X-ray radiography Examples of neutron activation systems include: pulsed
Cargo_scanning
Scientific study of crystal structures
Kikuchi lines in an electron backscatter diffraction pattern of monocrystalline silicon, taken at 20 kV with a field-emission electron source
Crystallography
Mathematical model for turbulence
The transfer of energy from unresolved to resolved scales is called backscatter (and likewise the transfer of energy from resolved to unresolved scales
Large_eddy_simulation
Compact astronomical body
the outgoing section of the inner horizon, infalling radiation would backscatter off of the black hole's spacetime curvature and travel outward, building
Black_hole
Atmospheric phenomenon
horizon during twilight, above the antisolar point. Like alpenglow, the backscatter of reddened sunlight also creates the Belt of Venus. Though unlike alpenglow
Belt_of_Venus
Model used by a fashion designer to check the fit and look of clothing
mm equivalent focal length Abbreviations list Angle of view Aperture Backscatter Black and white Chromatic aberration Circle of confusion Clipping Color
Fit_model
Creating email spam or phishing messages with a forged sender identity or address
addresses are typically reliable, so automated bounce messages may generate backscatter. Although email spoofing is effective in forging the email address, the
Email_spoofing
Partitioning of a seabed acoustic image into discrete physical entities or classes
multispectral multibeam backscatter. New methods of analyzing backscatter data, have increased its potential for seabed characterization. Backscatter data resolution
Acoustic seabed classification
Acoustic_seabed_classification
Failure of a lens to focus all colors on the same point
mm equivalent focal length Abbreviations list Angle of view Aperture Backscatter Black and white Chromatic aberration Circle of confusion Clipping Color
Chromatic_aberration
Small angle deflection of waves
lead to the scattering. Forward scatter is essentially the reverse of backscatter. Many different examples exist, and there are very large fields where
Forward_scatter
Japanese-American electrical engineer (1928–2025)
publications on coherent backscattering in many engineering and science journals. Later he further demonstrated enhanced backscattering in random rough surfaces
Akira_Ishimaru
Non-destructive elemental analysis technique
elastic collisions, Rutherford backscattering, often repelling the proton at angles close to 180 degrees. The backscatter give information on the sample
Particle-induced X-ray emission
Particle-induced_X-ray_emission
Practice of photographing the recently deceased
mm equivalent focal length Abbreviations list Angle of view Aperture Backscatter Black and white Chromatic aberration Circle of confusion Clipping Color
Post-mortem_photography
Email authentication method
address specified in an E-mail message is valid. It is designed to reject backscatter, that is, bounce messages to forged return addresses. The basic idea
Bounce_Address_Tag_Validation
American actress and writer
Furukawa Episode: "The Sixth Man" 2006 Numb3rs Student #1 Episode: "Backscatter" 2007–2009 Damages Female Associate 2 episodes 2008 Law & Order Tina
Hettienne_Park
Stainless steel that has both austenitic and ferritic phases
fields of intragranular slip bands in ferrite by high-resolution electron backscatter diffraction". Acta Materialia. 239 118284. Bibcode:2022AcMat.23918284K
Duplex_stainless_steel
American oceanographer (born 1967)
July 5, 2023. Gallaudet, Timothy Cole (2001). Shallow water acoustic backscatter and reverberation measurements using a 68-kHz cylindrical array (Ph.D
Timothy_Gallaudet
Instrument for measuring the concentration of suspended particulates
a special case of FTU. Formazin Backscatter Units (FBU), not part of a standard, is the unit of optical backscatter detectors (OBS), measured at c. 180°
Nephelometer
British photography magazine
mm equivalent focal length Abbreviations list Angle of view Aperture Backscatter Black and white Chromatic aberration Circle of confusion Clipping Color
Amateur_Photographer
Genre of astrophotography capturing the image of eclipses
mm equivalent focal length Abbreviations list Angle of view Aperture Backscatter Black and white Chromatic aberration Circle of confusion Clipping Color
Eclipse_photography
Automatically updating retail label
offered for sale by National Cash Register (NCR) in 1997 used modulated backscatter of radio waves to provide two way wireless communications between the
Electronic_shelf_label
Type of radar where a known stable frequency continuous wave radio energy is transmitted
Transmitter transmitted energy Receiver backscattered energy, containing much information about the backscatterer Continuous-wave radar (CW radar) is a
Continuous-wave_radar
Narrow beam of electromagnetic radiation or charged particles
is sometimes delivered through the use of pencil beam scanning. In backscatter X-ray imaging a pencil beam of x-ray radiation is used to scan over an
Pencil_(optics)
American weather satellite (2009–2025)
(TED) and MEPED (Medium Energy Proton and Electron Detector). The Solar Backscatter Ultraviolet Spectral Radiometer (SBUV/2) was designed for a two-year
NOAA-19
Automated photography device
mm equivalent focal length Abbreviations list Angle of view Aperture Backscatter Black and white Chromatic aberration Circle of confusion Clipping Color
Remote_camera
Scattering of light by tiny particles in a colloidal suspension
translucent layer re-emerges via a radial scattered path. That is, there is backscatter, the redirection of the light waves back out to the open air. Scattering
Tyndall_effect
mm equivalent focal length Abbreviations list Angle of view Aperture Backscatter Black and white Chromatic aberration Circle of confusion Clipping Color
List of photographs considered the most important
List_of_photographs_considered_the_most_important
Composition technique
mm equivalent focal length Abbreviations list Angle of view Aperture Backscatter Black and white Chromatic aberration Circle of confusion Clipping Color
Rule_of_thirds
Body screening device
of full body scanner used for body imaging; a competing technology is backscatter X-ray. Millimeter wave scanners come in two varieties: active and passive
Millimeter_wave_scanner
Analytical techniques involving ion beams
determine the depth profile of damage in single crystals. RBS: Rutherford backscattering is sensitive to heavy elements in a light matrix. This technique is
Ion_beam_analysis
35mm camera from Kodak
mm equivalent focal length Abbreviations list Angle of view Aperture Backscatter Black and white Chromatic aberration Circle of confusion Clipping Color
Kodak_35
Urgent removal of people from an area of imminent or ongoing threat
equipment. Most of them are wireless devices such as IDs scanner, beacons or backscatter system. The new techniques are for example based on a communication protocol
Emergency_evacuation
Type of radio propagation
(62 mi) altitudes within the auroral oval backscatter radio waves, including those on HF and VHF. Backscatter is angle-sensitive—incident ray vs. magnetic
Non-line-of-sight_propagation
Network traffic lacking a routable destination
packets often contain unsolicited commercial or network control messages, backscatters, port scans, and worm activities. Smaller devices such as DSL modems
Internet_background_noise
Form of photography emphasizing simplicity
mm equivalent focal length Abbreviations list Angle of view Aperture Backscatter Black and white Chromatic aberration Circle of confusion Clipping Color
Minimalist_photography
American weather satellite (1998–2025)
SARSAT Search and Rescue Satellite-Aided Tracking System SBUV/2 Solar Backscatter Ultraviolet Radiometer AMSU-A Advanced Microwave Sounding Unit-A AMSU-B
NOAA-15
Type of sensor
relies on light which is Rayleigh backscattered from small variations in the refractive index of the fiber. The backscattered light has the same frequency
Distributed_acoustic_sensing
Procedure of deliberately processing photographic film
mm equivalent focal length Abbreviations list Angle of view Aperture Backscatter Black and white Chromatic aberration Circle of confusion Clipping Color
Cross_processing
Topics referred to by the same term
Brain Stimulation, noninvasive forms of neurostimulation Non-invasive backscattering Nib (pen) Cacao nibs, pieces of roasted cocoa bean, generally ground
NIBS
Electronic tracking technology
history). In 1973, an early demonstration of reflected power (modulated backscatter) RFID tags, both passive and semi-passive, was performed by Steven Depp
Radio-frequency identification
Radio-frequency_identification
Spectroscopic technique
also scatter light, with their relative contribution increasing in the backscatter direction. As changes in the morphology of epithelial cells are hallmarks
Light_scattering_spectroscopy
mm equivalent focal length Abbreviations list Angle of view Aperture Backscatter Black and white Chromatic aberration Circle of confusion Clipping Color
List_of_largest_photographs
Longevity of printed material
mm equivalent focal length Abbreviations list Angle of view Aperture Backscatter Black and white Chromatic aberration Circle of confusion Clipping Color
Print_permanence
Effect in filmmaking
mm equivalent focal length Abbreviations list Angle of view Aperture Backscatter Black and white Chromatic aberration Circle of confusion Clipping Color
Slow_motion
Optoelectronic instrument
extracts, from the same end of the fiber, light that is scattered (Rayleigh backscatter) or reflected back from points along the fiber. The scattered or reflected
Optical time-domain reflectometer
Optical_time-domain_reflectometer
Type of camera lens with long focal length
mm equivalent focal length Abbreviations list Angle of view Aperture Backscatter Black and white Chromatic aberration Circle of confusion Clipping Color
Telephoto_lens
Optical component which splits light into several beams
convention for θm: plus (positive) if θm = θi describes the case of backscatter; minus (negative) if it describes specular reflection. Note that the
Diffraction_grating
Type of naturally occurring asphalt
mm equivalent focal length Abbreviations list Angle of view Aperture Backscatter Black and white Chromatic aberration Circle of confusion Clipping Color
Bitumen_of_Judea
Loss of plasticity in ferritic stainless steel
fields of intragranular slip bands in ferrite by high-resolution electron backscatter diffraction". Acta Materialia. 239 118284. Bibcode:2022AcMat.23918284K
475_°C_embrittlement
Open standard for inductive charging developed by the Wireless Power Consortium
unidirectional from the power receiver to the power transmitter via backscatter modulation. In backscatter modulation, the power-receiver coil is loaded, changing
Qi_(standard)
Photography genre
mm equivalent focal length Abbreviations list Angle of view Aperture Backscatter Black and white Chromatic aberration Circle of confusion Clipping Color
Landscape_photography
to listen to weaker and more distant stations. Radio portal Ambient backscatter Antique radio Battery eliminator Crystal radio Human-powered equipment
Batteryless_radio
Photograph captured without creating a posed appearance
mm equivalent focal length Abbreviations list Angle of view Aperture Backscatter Black and white Chromatic aberration Circle of confusion Clipping Color
Candid_photography
Japanese physicist
Nishikawa observed and gave a theoretical explanation of the electron backscatter diffraction pattern from a calcite cleavage face. In 1929, he went to
Seishi_Kikuchi
United States federal government agency
emitted by backscatter X-rays, and there are fears that people will be exposed to a "dangerous level of radiation if they get backscattered too often"
Transportation Security Administration
Transportation_Security_Administration
BACKSCATTER
BACKSCATTER
BACKSCATTER
BACKSCATTER
Surname or Lastname
English
English : occupational name for the servant of a man called Wa(l)ter (see Water 1).English and Dutch : occupational name for a boatman or a water carrier, or a topographic name for someone who lived by a stretch of water (see Water 2).Americanized form of German and Jewish (Ashkenazic) Wasserman(n), an occupational name for a water-carrier. Compare 2 above.Robert Waterman emigrated from England to Marshfield, MA, in 1636.
Boy/Male
English
From Wine's Forest
Boy/Male
African, Arabic, Swahili
Expensive; Scare; Costly
Boy/Male
English, Hindu, Indian
Prince; Destroyer of Enemies; Fighter of Enemies; Great Heart; Sweet Fragrance
Surname or Lastname
English (West Midlands)
English (West Midlands) : topographic name for someone who lived at a millhouse (from Middle English mulle + hus; compare Millhouse), or a metonymic occupational name for someone who worked in one.
Girl/Female
Tamil
Aavihshka | ஆவீஹà¯à®·à¯à®•à®¾
Altruism, Advantage, Virtue, Accord, Heart, Warm and loving. heart, Warm and loving. for you are blessed with many
Boy/Male
Biblical
End.
Boy/Male
Muslim
Boy/Male
British, English
Storekeeper
Boy/Male
Hindu, Indian
World Famous
BACKSCATTER
BACKSCATTER
BACKSCATTER
BACKSCATTER
BACKSCATTER