Photon: Difference between revisions
From Glossary of Meteorology
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<div class="definition"><div class="short_definition">The massless [[particle]] that, according to the [[quantum theory]] of [[radiation]], carries the smallest discrete amount of [[electromagnetic energy]] ''h''ν, where ''h'' is [[Planck's constant]] and ν is the [[frequency]] of the associated [[electromagnetic wave]].</div><br/> <div class="paragraph">Although the photon has no mass it does have ([[linear]]) [[momentum]] ''h''ν/''c'', where ''c'' is the free- space [[speed of light]], and intrinsic [[angular momentum]] (spin) ''h''/2π, as evidenced by [[radiation pressure]] and [[radiation torque]].</div><br/> </div> | <div class="definition"><div class="short_definition">The massless [[particle]] that, according to the [[quantum theory]] of [[radiation]], carries the smallest discrete amount of [[electromagnetic energy]] ''h''ν, where ''h'' is [[Planck's constant]] and ν is the [[frequency]] of the associated [[electromagnetic wave]].</div><br/> <div class="paragraph">Although the photon has no mass it does have ([[linear]]) [[momentum]] ''h''ν/''c'', where ''c'' is the free- space [[speed of light]], and intrinsic [[angular momentum]] (spin) ''h''/2π, as evidenced by [[radiation pressure|radiation pressure]] and [[radiation torque]].</div><br/> </div> | ||
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Latest revision as of 17:36, 25 April 2012
photon
The massless particle that, according to the quantum theory of radiation, carries the smallest discrete amount of electromagnetic energy hν, where h is Planck's constant and ν is the frequency of the associated electromagnetic wave.
Although the photon has no mass it does have (linear) momentum hν/c, where c is the free- space speed of light, and intrinsic angular momentum (spin) h/2π, as evidenced by radiation pressure and radiation torque.
