Size parameter: Difference between revisions
From Glossary of Meteorology
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<div class="definition"><div class="short_definition">The ratio of the size of a spherical [[scattering]] particle to the [[wavelength]] of the [[radiation]] being scattered, that is, α = π''d''/λ, where ''d'' is the diameter of the [[particle]], and λ is the wavelength of the incident radiation.</div><br/> <div class="paragraph">[[Mie theory]] describes the general process of [[extinction]], scattering, and [[absorption]] of spherical particles as a function of the size parameter and [[refractive index]]. For α < ≈0.1, the [[Rayleigh scattering]] approximation becomes valid, whereas for α > ≈100, geometrical optics becomes valid.</div><br/> </div> | <div class="definition"><div class="short_definition">The ratio of the size of a spherical [[scattering]] particle to the [[wavelength]] of the [[radiation]] being scattered, that is, α = π''d''/λ, where ''d'' is the diameter of the [[particle]], and λ is the wavelength of the incident radiation.</div><br/> <div class="paragraph">[[Mie theory]] describes the general process of [[extinction]], scattering, and [[absorption]] of spherical particles as a function of the size parameter and [[refractive index]]. For α < ≈0.1, the [[Rayleigh scattering|Rayleigh scattering]] approximation becomes valid, whereas for α > ≈100, geometrical optics becomes valid.</div><br/> </div> | ||
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Latest revision as of 16:53, 25 April 2012
size parameter
The ratio of the size of a spherical scattering particle to the wavelength of the radiation being scattered, that is, α = πd/λ, where d is the diameter of the particle, and λ is the wavelength of the incident radiation.
Mie theory describes the general process of extinction, scattering, and absorption of spherical particles as a function of the size parameter and refractive index. For α < ≈0.1, the Rayleigh scattering approximation becomes valid, whereas for α > ≈100, geometrical optics becomes valid.
