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radiation pressure

noun, Physics.
1.
the pressure exerted on a surface by electromagnetic radiation or by sound waves.
Origin
1900-1905
1900-05
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for radiation pressure
  • The dense sphere will also be virtually unaffected by radiation pressure from sunlight.
  • Eventually, radiation pressure from the star blows away the envelope and the new star begins its evolution.
  • So physicists got to wondering whether radiation pressure could be harnessed to help an item soar.
  • They only know of the radiation pressure studies which tend to be done with collimated beams of light or lasers.
  • The system is closed by an approximate expression for the radiation pressure.
radiation pressure in Science
radiation pressure  
Force per unit area exerted by waves or particles of radiation, especially photons. Though photons have no mass, they do have momentum, and can transfer that momentum to other particles upon impact. The amount of pressure exerted by a given amount of radiation depends on whether the radiation is absorbed or reflected. Radiation pressure is responsible for the Casimir effect; solar radiation pressure is exploited in the design of solar sails.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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