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Rayleigh scattering


Rayleigh scattering
Information sur la photo
Copyright: Paolo Motta (Paolo) Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 4652 W: 146 N: 9145] (40237)
Genre: Lieux
Média: Couleur
Date de prise de vue: 2008-05-01
Catégories: Vie quotidienne, Nature
Appareil photographique: Nikon d40 dslr
Exposition: f/4.5, 1/60 secondes
Versions: version originale
Date de soumission: 2008-05-08 1:07
Vue: 856
Favoris: 1 [voir]
Points: 40
[Ligne directrice - Note] Note du photographe
Sunset is the time at which the sun disappears below the horizon in the west. It should not be confused with dusk, which is the point at which darkness falls, some time after the beginning of twilight when the sun itself sets.
The sunset is often more brightly colored than the sunrise, with the shades of red and orange being more vibrant. The atmosphere responds in a number of ways to exposure to the sun during daylight hours. In particular, there tends to be more dust in the lower atmosphere at the end of the day than at the beginning. During the day, the sun heats the surface of the Earth, lowering the relative humidity and increasing wind speed and turbulence, which serves to lift dust into the air.

The red hues of the sky at sunset and sunrise are caused by Rayleigh scattering, the same mechanism that causes the sky to be blue.
As light travels through the atmosphere, some of it is scattered at large angles by small particles. This type of scattering, where the particles are much smaller than the wavelength, is called Rayleigh scattering. Because Rayleigh scattering is much stronger for shorter wavelengths, like blue, the light from a clear sky is blue. Likewise, as the blue component is scattered out of a ray of sunlight, the remaining light becomes yellower. At sunrise or sunset the light has traveled a long distance through the atmosphere leaving only the longest wavelengths like orange and red. The reddened sunlight illuminates clouds and other particles. The combination of orange and red clouds and the blue sky can produce a variety of colors.
Volcanic eruptions release particles into the atmosphere that affect scattering. A number of eruptions in recent times, such as those of Mount Pinatubo in 1991 and Krakatoa in 1883, have been sufficiently large to produce remarkable sunsets and sunrises all over the world.
Sometimes just before sunrise or after sunset a green flash can be seen.


Model: NIKON D40
Software: Ver.1.10
Exposure Time: 10/600 sec
F-Stop: f/4.5
ISO Speed Ratings: 1600
Focal Length: 34 mm
Date Taken: 2008-05-01 18:21
Metering Mode: Pattern
Flash: Flash fired, auto mode, return light not detected
File Size: 190 kb
jhm, AiresSantos, carper, xavshot, bobocortis, feather, rigoletto, mvdisco, Emile, brandstaetter trouve(nt) cette note utile
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Critiques [Translate]

Ciao Paolo
Amazing colours in this lovely sunset. Excellent moment very well captured
TFs and have a nice day
Aires

  • Great 
  • barni Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 1743 W: 92 N: 1777] (10848)
  • [2008-05-08 1:15]

Hello Paolo
Belle couleur de fin de journée et la présence des étoiles dans le ciel est sympa.
Regards
Christophe

Hi Paolo,
What a wonderful scene you captured.
Perfect colors,exposure and composition.
Georg

Pronto Paolo.

Excellent colours! The depth is also impressive.

My compliments!

Rgs, Oscar

Lo specialista dei tramonti colpisce ancora , molto bella Paolo , colori strabilianti e composizione ben bilanciata , complimenti.
Stefano.

Hi Paolo, my neigbour today,
Wonderfull scene, perfectly captured. Nice warm and well balanced colors. Perfect effect and nice light control.
TFS and best regards
MESUT ILGIM

Paolo
the colours are just perfect! well captured
marianna

  • Great 
  • carper Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 9657 W: 445 N: 15935] (56364)
  • [2008-05-08 3:37]

marvelous sky Paolo
wauw just like a dream to be there with the one you love and your camera, good atmosphere and a fine quality, fine photojob, have a nice day.
gr./ jaap

Hi Paolo,
Great variety of bright colours on this sunset shot. Even clouds on different levels have varying hues. And while there is intense orange glow in the horizon, it's interesting to see already two stars higher up in the sky.
Kari

Bonjour Paolo
ton image possède de très belles couleurs et est trèas agréable à regarder. Belle luminosité.
amicalement
Xavier

Ciao Paolo.
Darti dell'originale è fuori luogo con questa foto, ma la nota ti riabilita.
E comunque la foto male non è, per il forte contrasto fra tonalità calde e fredde e il movimento delle nuvole.
Ciao, Bobo.

Although there are no silhouettes to catch our attention, the colours alone carry this image. The purples and oranges are glorious. Well done
Kath

  • Great 
  • Cricri Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 4757 W: 232 N: 6628] (31604)
  • [2008-05-08 8:48]

Ciao Paolo,
Une jolie palette de couleurs de ce coucher de soleil bien capturer au beau moment,
Friendship
cricri

Ciao Paolo,
I wouldn't have guessed that Rayleigh Scattering, which is a damn nightmare for engineers, would become the title of a paolonian sky. Marvellous scattering indeed, and the two stars crown the color palette.
Ciao ciao,
Deniz

Hi Pablo,
Nice sunset and amazing colors and presentation,Excellent POV. and details, excellent composition and well done.
Michel

  • Great 
  • Emile Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 4250 W: 144 N: 4682] (16876)
  • [2008-05-08 15:49]

Hola Paolo.
Wonderful composition, beautiful sunset photo with very good sky colors, excellent scene.
Well done. TFS.
Best regards.

Olá / Ciao Paolo,

Wonderful sunset compo! Amazing colors, good contrast...

Regards and have a nice weekend,
Filipe

  • Great 
  • jhm Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 12760 W: 273 N: 17393] (70015)
  • [2008-05-09 2:52]

Hello Paolo,

What a wonderful painting my friend with this sunset.
I saw different paintings with this subject, and almost the same colours.
Splendid sky and excellent part of the sea, good composition and presentation too.
Very well done, thanks for sharing.

I wish you a very nice Pentecost weekend,
John.

Ciao Paolo,
con la tua nota adesso tutto e´ chiaro per me.. al momento ho solo problemi di trasportare i colori giusti anche nelle mie foto.
Ciao, grazie, Christian

Wow Paolo! U remember physics very well!! :O
amazing capture although. TFS,Neelima.

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