radiation pressure


Also found in: Dictionary, Thesaurus, Wikipedia.

Radiation pressure

Pressure exerted by electromagnetic radiation on objects on which it impinges. This pressure is caused by the fact that electromagnetic radiation transmits energy and possesses momentum. These pressures are very small. The effect is conspicuous in the case of a comet near the Sun, where the radiation pressure from the Sun forces the lighter cometary constituents away from the Sun. See Electromagnetic radiation

radiation pressure

The very small pressure exerted on a surface by light or other electromagnetic radiation. The radiation is considered as a stream of photons, and the pressure is then due to the transfer of momentum from the photons to the surface. Although radiation pressure has a negligible effect on large particles or on dense matter, the effect is considerable with very small particles, which are driven away from the radiation source. Thus solar radiation pressure, aided by the solar wind, clears tiny particles of dust (< 1 μm) from the Solar System. See also Poynting–Robertson effect.

radiation pressure

[‚rād·ē′ā·shən ‚presh·ər]
(acoustics)
The average pressure exerted on a surface or interface between two media by a sound wave.
(electromagnetism)
The pressure exerted by electromagnetic radiation on objects on which it impinges.
References in periodicals archive ?
Inside a star, the internal pressure acting against the hydrostatic pressure is the sum of the radiation pressure and gas pressure, hence:
The experiment was originally conceived to demonstrate the effects of radiation pressure on an interface between two fluids.
After switching the ultrasound on and pressing the dynamic measurements button the result of liquid pressing on the cone, due to the radiation pressure and so called "quartz wind" or "acoustic wind" is read on the scales, usually as a negative number.
The most obvious setup would be a ring orbiting Earth, but problems would arise from atmospheric drag, complications by radiation pressure, and interference with other space activities.
The study modeled how PeI and radiation pressure interact with each other to affect the movement of gas and dust in the debris disk around stars.
Since stellar collisions would join two fully formed lower-mass stars, radiation pressure never becomes an issue during formation.
Christine Demore, a physicist at the University of Dundee in Scotland, and colleagues set out to reverse the direction of that radiation pressure, so that an object would get pulled rather than pushed.
MPEC 2010-N23 issued by the Minor Planet Center in July announced that object 2010 KQ is in fact artificial, after astrometry by the Director using robotic telescopes showed its orbit was too strongly affected by solar radiation pressure for it to be a natural object.
He solved the problem by invoking outward radiation pressure originating from the central core.
And during the final few seconds as the internal thermal gradient and radiation pressure precipitously increased, an equally intense plasmoid magnetic field built up.
Ensuring robustness into the future, ReDSHIFT will take advantage of disruptive opportunities offered by 3D printing to develop highly innovative, low-cost spacecraft solutions, exploiting synergies with electric propulsion, atmospheric and solar radiation pressure drag, and astro-dynamical highways, to meet de-orbit and disposal needs, but which are also designed for demise.
In a spherically symmetric case, matter cannot fall onto a central object when the radiation pressure exceeds the gravity.

Full browser ?