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Exploring Fractal Art and Rayleigh Scattering: The Sky in UVB and Near IR Wavelengths

This overview delves into the captivating interplay of fractal art and the scientific principles of Rayleigh scattering in the UVB (290-320 nm) and near-infrared (700-1500 nm) wavelengths. It imagines a unique representation of the sky if perceived through these non-visible spectrums, supported by references to molecular anisotropy, refractive indices, and energy distribution. Utilizing sources from various physics and atmospheric science resources, we explore the implications of light scattering by air molecules, contributing to a nuanced understanding of our visual environment.

sean-merritt
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Exploring Fractal Art and Rayleigh Scattering: The Sky in UVB and Near IR Wavelengths

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  1. Dipole in Abstract Fractal Art From: http://www.raygirvan.co.uk/apoth/dipole.jpg

  2. What would the sky look like if you saw in the Uvb (290-320 nm) or near IR (700-1500 nm) instead of the visible (400-700 nm)? IR VIS UVb

  3. Rayleigh Scattering: Photon Directions From: http://www.srrb.noaa.gov/highlights/redsky/page3.html

  4. Whitening of the horizon: Rayleigh Scattering followed by Rayleigh Extinction From: http://www.m-why.com/archives/2005/03/

  5. Rayleigh Scattering (light scattering by air as dipole radiation) From Liou pg 93.  is the molecular anisotropy parameter as the polarizability is really a tensor. The refractive index relationship is in relation to the polarizability of air.  = 0.035 for air. Dry air, 15 C, 101325 Pa, 0.045% CO2 by volume, vacuum  in microns, (Birch, Metrologia, 1994, 31, 315). From http://www.kayelaby.npl.co.uk/general_physics/2_5/2_5_7.html. Dry air, t in Celcius, P in Pascal, 0.045% CO2 by volume, Birch, Metrologia, 1994, 31, 315). From http://www.kayelaby.npl.co.uk/general_physics/2_5/2_5_7.html. Number concentration of air molecules.

  6. Dry Air Refractive Index

  7. Rayleigh Scattering (light scattering by air as dipole radiation)

  8. Rayleigh Scattering (light scattering by air as dipole radiation)

  9. Rayleigh Scattering (light scattering by air as dipole radiation) 42.3% of Total Energy, TOA

  10. Rayleigh Scattering (light scattering by air as dipole radiation) 1.5% of Total Energy, TOA

  11. Rayleigh Scattering (light scattering by air as dipole radiation) 6.3% of Total Energy, TOA

  12. Rayleigh Scattering (light scattering by air as dipole radiation) 0.5% of Total Energy, TOA

  13. Rayleigh Scattering In Perspective Relative to Absorption

  14. Angular Dependence of Rayleigh Scattering (dipole) From: http://qels.com/theory/rayleighscattering/mass.cfm http://www.bo.astro.it/sait/spigolature/spigo402base.html Horizontal E-field Vertical E-field Dipoles don’t radiate in the direction they are undergoing linear ocsillation. From http://www.sparknotes.com/physics/optics/phenom/section3.rhtml

  15. I0 N scatterers / volume q Isca(q) Rayleigh Scattering Intensity as a function of Scattering Angle. Random E-field incident, random scatterer orientation. From: http://www.jenkinsdisplays.com/led_bulbs/rayleigh_scattering.html

  16. Dipole Radiation Pattern: (Petty, Ch12). Incident E-field vertical: Dipole charge oscillation vertical.  = incident direction Irradiance Average for Random E-field: sum of the polarized patterns / 2. Incident E-field Horizontal

  17. UV thoughts from http://uvb.nrel.colostate.edu/UVB/publications/uvb_primer.pdf

  18. UV thoughts from http://uvb.nrel.colostate.edu/UVB/publications/uvb_primer.pdf

  19. UV thoughts from http://uvb.nrel.colostate.edu/UVB/publications/uvb_primer.pdf

  20. UV thoughts from http://uvb.nrel.colostate.edu/UVB/publications/uvb_primer.pdf Diffey action spectra: Damage spectra for sun-burn: 305 nm, rule of thumb, ‘worst’ UV wavelength.

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