the pressure exerted on a surface by electromagnetic radiation or by sound waves.
Science Terms That We All Pretend To KnowIn the spirit of scientific community and understanding, let's clear up some misconceptions around a few of the most misunderstood scientific terms. Let’s boldly go where no man has gone before.
Beware the email rumor about “Betelgeuse.” What does “Betelgeuse” mean, anyhow?Betelgeuse has been in the news again recently. No, not the creepy character played by Michael Keaton in the 1988 Tim Burton movie Beetlejuice . We’re talking about the red supergiant star in the constellation Orion, that Betelgeuse. Apparently, some pseudo-scientific gossip is circulating online claiming that Betelgeuse will explode in 2012, causing damaging neutrino release and gamma radiation. There will be two bright, sun-like …
- radiation dermatitis,
- radiation fog,
- radiation of corpus callosum,
- radiation pattern,
- radiation potential,
- radiation pressure ,
- radiation pyrometer,
- radiation resistance,
- radiation sickness,
- radiation therapy
Origin of radiation pressure
First recorded in 1900–05
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
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 © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.