radiation pressure
radiation pressure
| Noun | 1. |  radiation pressure - the minute pressure exerted on a surface normal to the direction of propagation of a wave |
| 单词 | radiation pressure | |||
| 释义 | radiation pressureradiation pressure
radiation pressureRadiation pressurePressure 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 pressureThe 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]radiation pressure
Synonyms for radiation pressure
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