Scattering is a general physical process where some forms of radiation, such as light, sound, or moving particles, are forced to deviate from a straight trajectory by one or more localized non-uniformities in the medium through which they pass.
Compton scattering is interesting as to completely explain the effect requires quantum physics and relativity. When Arthur Holly Compton first conducted his experiments into this effect in 1923 at Washington University, St.
Compton Scattering
The region from about 1 to 30 MeV is a difficult, but interesting, part of the gamma-ray astronomy energy range.
Scattering
Scattering of light is strongest when the wavelength of the light is of the same order of magnitude as the diameter of the scattering particles. Visible light, therefore, is more readily scattered by dust and mist than infrared.
scattering (of light): the process whereby a ray of light hits a small particle and is redirected over a wide range of solid angles.
Scattering spectroscopy measures certain physical properties by measuring the amount of light that a substance scatters at certain wavelengths, incident angles, and polarization angles.
Scattering Matrix: A matrix representing the transitions from some initial to some final state in a given interaction. The transitions may involve changes in the number of particles in the system. [H76]
S-Process ...
Scattering - The redirection of light in random directions when it strikes atoms, molecules, or solid particles
Schwarzschild Radius - The radius of the event horizon of a black hole ...
BACKSCATTERING - Primary radiation or particles (electrons, protons, etc.) deflected or secondary radiation and particles emitted in the general direction of the incident beam.
Forward Scattering
The optical property of finely divided particles to preferentially direct light in the original direction of the light's travel
Frequency ...
scattering
(via polarization)
Various of these dominate at different wavelengths, so we may begin to decompose galaxies into constituents even if we have only the integrated radiation to work with. Consider some schematic broad-band galaxy spectra.
scattering - (n.)
The random reflection of photons by particles such as atoms or ions in a gas, or dust particles in interstellar space.
Schmidt camera - (n.) ...
Scattering of radiation (or particles) through angles greater than 90° with respect to the original direction of motion. [H76]
Back Warming
Heating of deeper layers in a star due to overlying opacity. [H76]
BAD Nuclei ...
Scattering interposes a luminous veil between the observer and his/her subject.
Scattering spectroscopy measures the amount of light that a substance scatters at certain wavelengths, incident angles, and polarization angles.
The scattering of light from dust grains in long exposure visible photographs is quite noticeable in reflection nebulas, and gives clues about the individual particle's light-scattering properties.
RALEIGH SCATTERING
Raleigh scattering is the phenomenon in which light is scattered by objects small in relation to the wavelength of the light.
Compton scattering The scattering, or collision, of a photon with an electron.
conservation of energy A fundamental law of modern physics which states that the sum of the various forms of energy must always remain constant in any physical process.
The multiple scattering of photons by a hot plasma in the early Universe should result in a blackbody spectrum for the photons once they have escaped at the epoch of reionisation. This is exactly what is observed for the CMB.
Grade 5 - 12 Scattering: Seeing the microscopic among the giants Analogy: The rings and atmospheres of Saturn and Titan
Grades 5 - 12 Unveiling Titan's surface Analogy: Titan's surface unveiled by Cassini radar ...
Mie scattering (NASA Thesaurus / NASA SP-7, 1965) Any scattering produced by spherical particles without special regard to comparative size of radiation wavelength and particle diameter. See Mie theory.
back scattering (NASA SP-7, 1965) = backward scatter. back-scattering cross section (NASA SP-7, 1965) See scattering cross sections. back-to-chest acceleration (NASA SP-7, 1965) See physiological acceleration, table.
examine scattering, absorption, and solar heating within the atmospheres of Saturn/Titan
search for lightning, aurorae, and airglow
investigate the gravitational interactions among Saturn's rings and satellites ...
Scattering: Seeing the Microscopic Among the Giants (PDF, 283 KB): Participants observe that reflection from light comes from the objects around us.
reddening the preferential scattering of the shorter wavelengths of light as it passes through a dust cloud, ...
(This conception of the cometary nucleus became known as the "sandbank" model [see below Cometary models].) Meteor showers were explained by the spontaneous scattering of the dust grains along a comet's orbit, ...
There are lots of ways that the photons can interact in a dense gas to change their wavelengths (scattering for example).
We have talked about gas and dust, and about how we can detect them through emission and about scattering in HII regions and reflection nebula. There are more types of interstellar regions than just those two type of nebula however.
More importantly, Rayleigh scattering by air molecules accounts for up to 0.14 magnitude increases per air mass. Finally, aerosol scattering (dust, water and manmade pollutants) adds about 0.12 magnitudes per air mass.
The energy from the nearby star, or stars, is insufficient to ionize the gas of the nebula to create an emission nebulae, but is enough to give sufficient scattering to make the dust visible.
1966 - Rainer Sachs and Arthur Wolfe theoretically predict microwave background fluctuation amplitudes created by gravitational potential variations between observers and the last scattering surface (see Integrated Sachs Wolfe effect) ...
The apparent scattering or diversity of the flights is merely an effect of perspective upon objects really traversing parallel lines. The centre upon which the observed paths converge is called the radiant point or, shortly, the radiant.
The image was acquired at a distance of about 1 million kilometers (621,371 miles) in a near ultraviolet filter that is sensitive to scattering by small particles.
The same scattering effect on the blue light, also takes place, but the blue light is unable to pass through the extra distance and reach our eyes.
The high brightness, pure color, and directionality of laser light make it ideally suited for experiments on light scattering. Even a small amount of light that is scattered with a change of wavelength or direction can be readily identified.
Unlike recent eclipses that have passed over large land masses such as China, parts of Russia, Turkey and Africa, the 11 July eclipse passes over mainly ocean, with only a small scattering of tiny Polynesian islands experiencing totality.
He went on to prove that the amount of scattering is actually inversely proportional to the fourth power of the wavelength, so that blue light is scattered about nine times (that is, [700/400]4) more efficiently than red light.
taken by Voyager looking back at Titan and showing sunlight scattering in the atmosphere. The atmosphere of Titan has several layers of haze. It has a pressure at the surface of 1.
A radar beam scattering off electrons in the ionospheric Plasma creates an incoherent scatter echo....
radars operate above the critical frequencies.
Norma, (originally Norma et Regula, the builder's level and set square) is an insignificant scattering of stars compared to Lupus and Centaurus.
The reduction in the intensity of light from a celestial body due to absorption and scattering by Earth's atmosphere.
It is blue in color, owing to the scattering of blue light by methane. It is similar to Saturn and Jupiter in many respects, like the atmosphere composition, the internal heating mechanism, the presence of magnetic field, ...
The sky would appear black because there's little atmospheric scattering of light. However, one would be able to see two bright "stars," possibly discernible as cream-colored Venus and blue-colored Earth.
Because laser light is highly directional and monochromatic, extremely small amounts of light scattering or small frequency shifts caused by matter can easily be detected.
The outer layers of the star are blown off in the explosion at speeds up to 9600 km/s (6000 miles/s), scattering heavy elements through space.
The spherical region of a spiral galaxy containing a thin scattering of stars, star clusters, and small amounts of gas.
heliocentric universe
A model of the universe with the Sun at the center, such as the Copernical universe.
An afterglow is a wide arc of glowing light that can sometimes be seen high in the western sky at twilight; it is caused by fine particles of dust scattering light in the upper atmosphere. 2.
In the atmosphere, these turbulent boundaries are exquisitely visible in the light scattering contours of cumulus clouds, formed as convection currents of warm, moist air surge into motionless, cooler air above (image, below).
1911--Ernest Rutherford conducts his experiments with the scattering of alpha particles off atoms, concludes that the atom's mass and positive charge are concentrated in a tiny nucleus.
Extinction Loss of light from an object as a consequence of absorption or scattering by an intervening medium. An example is the atmospheric extinction of light from stars near the horizon.
The blue color of the sky is a result of this scattering process. At night, when that part of Earth is facing away from the Sun, space looks black because there is no nearby bright source of light, like the Sun, to be scattered.
a faint, cone-shaped glow of light seen in the west after nightfall or in the east before dawn, caused by sunlight reflecting and scattering off interplanetary dust particles lying along the ecliptic plane
SEARCH SITE ...
airglow
The background light in the night sky caused by the atmospheric scattering of man-made light.
The northern dog, called Asterion (‘little star'), is marked only by a scattering of faint stars. Johann Bode drew the dogs with their names engraved on their collars in his Uranographia atlas.
Arthur Holly Compton, who studied the scattering of high-energy photons by electrons. It will fall into the remote Pacific on June 3, 2000. CGRO detected more than 400 gamma ray sources and recorded more than 2,500 gamma ray bursts.
Albedo is the ratio between the amount of light actually reflected and that which would be reflected by a uniformly scattering disk of the same size, both observed at opposition. Snow has an albedo of approximately 1 and coal an albedo of about 0.05.
Astronomers now think that a small, low-density asteroid entered the Earth's atmosphere at a glancing angle and exploded about 5-8 km above Tunguska. The mysterious glow in the air that night would have been caused by sunlight scattering off dust ...
However, fine dust is very efficient at forward-scattering light, so dust tends to be brightest at high phase angles. The manner in which a ring scatters light can tell us a great deal about its particle properties.
The most favored current proposed mechanism involves interaction of the coma and the solar wind. The alternative mechanism of solar X-rays scattering off gas and dust does not appear to be consistent with the spectrum of observed X-rays.
 See also: Light, Energy, Earth, Time, Sun
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