Scattering
Download
1 / 33

Scattering - PowerPoint PPT Presentation


  • 368 Views
  • Uploaded on

Scattering. Types of Scattering in the Atmosphere. Rayleigh Mie Geometric. Rayleigh Scattering in Visible Spectrum. Blue sky Red Sunset Blue water (from underwater). Rayleigh Scattering. Wavelength of light is much larger than scattering particles

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Scattering' - Mia_John


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript


Rayleigh scattering in visible spectrum
Rayleigh Scattering in Visible Spectrum

  • Blue sky

  • Red Sunset

  • Blue water (from underwater)


Rayleigh scattering
Rayleigh Scattering

  • Wavelength of light is much larger than scattering particles

  • Blue light ~4000 Angstroms, scattering particles ~1 Angstrom (1A=10-10 m)



Angular intensity factor
Angular Intensity Factor

  • Where f is the angle between the incident beam and the scattered light so for non-polarized light


Rayleigh scattering1
Rayleigh Scattering

  • Can be explained in terms of oscillations of dipole atoms when excited by an EM wave

  • Derivation explains polarization as well

  • See Petty 341-347


Mie scattering
Mie Scattering

  • Explains scattering around larger droplets such as Corona around the sun or moon, Glory and similar phenomena.


Mie scattering1
Mie Scattering

  • Begin with Maxwell’s equations

  • Derive a wave equation in spherical polar coordinates

  • Provide boundary conditions at surface of a sphere

  • Solve the partial differential wave equation for dependence on r, q, f.


Mie scattering cont
Mie Scattering cont.

  • The bracket has the form of a Bessel function of the first order and


Mie scattering cont1
Mie Scattering cont.

  • Fortunately, there are some people who enjoy solving these equations and setting up computer programs to calculate the results.


ad