Rayleigh Effect: Difference between revisions
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===A Mathematical Model=== | ===A Mathematical Model=== | ||
:<math> I = I_0 \frac{ 1+\cos^2 \theta }{2 R^2} \left( \frac{ 2 \pi }{ \lambda } \right)^4 \left( \frac{ n^2-1}{ n^2+2 } \right)^2 \left( \frac{d}{2} \right)^6</math>,<ref>Seinfeld and Pandis, ''Atmospheric Chemistry and Physics, 2nd Edition'', John Wiley and Sons, New Jersey 2006, Chapter 15.1.1</ref> | |||
===A Computational Model=== | ===A Computational Model=== | ||
Revision as of 14:29, 5 December 2015
Rayleigh scattering, named after the British physicist Lord Rayleigh (John William Strutt),is the (dominantly) elastic scattering of light or other electromagnetic radiation by particles much smaller than the wavelength of the radiation.
The Main Idea
When light strikes small particles, it bounces off in a different direction in a process called scattering. Rayleigh scattering is the scattering that occurs when the particles are smaller than the wavelength of the light. This is the dispersion of electromagnetic radiation by particles that have a radius less than approximately 1/10 the wavelength of the radiation. The particles may be individual atoms or molecules. It can occur when light travels through transparent solids and liquids, but is most prominently seen in gases. Rayleigh scattering results from the electric polarizability of the particles. The oscillating electric field of a light wave acts on the charges within a particle, causing them to move at the same frequency. The particle therefore becomes a small radiating dipole whose radiation we see as scattered light.
A Mathematical Model
- [math]\displaystyle{ I = I_0 \frac{ 1+\cos^2 \theta }{2 R^2} \left( \frac{ 2 \pi }{ \lambda } \right)^4 \left( \frac{ n^2-1}{ n^2+2 } \right)^2 \left( \frac{d}{2} \right)^6 }[/math],[1]
A Computational Model
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- ↑ Seinfeld and Pandis, Atmospheric Chemistry and Physics, 2nd Edition, John Wiley and Sons, New Jersey 2006, Chapter 15.1.1