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DPChallenge Forums >> Photography Discussion >> can sombody help me understand photo?
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Showing posts 1 - 8 of 8, (reverse)
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04/21/2005 12:01:02 AM · #1
I took this picture some weeks ago but when I was checking it out I saw that light inside the rainbow was clearer then outside. Are some explanation?' . substr('//images.dpchallenge.com/images_portfolio/9780/thumb/167620.jpg', strrpos('//images.dpchallenge.com/images_portfolio/9780/thumb/167620.jpg', '/') + 1) . '

Message edited by author 2005-04-21 00:03:27.
04/21/2005 12:04:16 AM · #2
Dufus, just to make it easier to see the photo.....

click on the 5th icon above the text box and insert the ID number of the photo

Edited to remove thumbnail again because Dufus fixed it and just beat me to it :-)

Message edited by author 2005-04-21 00:05:04.
04/21/2005 12:06:31 AM · #3
Where is Mr. Science when you need him??
04/21/2005 12:07:07 AM · #4
Thats an awesome pic!!!
04/21/2005 12:08:56 AM · #5
isn't it called rain?
The refraction is from where the water begins - thus the rain area is the less clear part..

Graham
04/21/2005 12:25:26 AM · #6
Notice the contrast between the sky inside the arc and outside it. When one studies the refraction of sunlight on a raindrop one finds that there are many rays emerging at angles smaller than the rainbow ray, but essentially no light from single internal reflections at angles greater than this ray. Thus there is a lot of light within the bow, and very little beyond it. Because this light is a mix of all the rainbow colors, it is white. In the case of the secondary rainbow, the rainbow ray is the smallest angle and there are many rays emerging at angles greater than this one. Therefore the two bows combine to define a dark region between them - called Alexander's Dark Band, in honor of Alexander of Aphrodisias who discussed it some 1800 years ago!

found here
04/21/2005 12:29:45 AM · #7
I had a similar photo I was going to enter for the Free Study with a similar look:

' . substr('//images.dpchallenge.com/images_portfolio/34396/thumb/169051.jpg', strrpos('//images.dpchallenge.com/images_portfolio/34396/thumb/169051.jpg', '/') + 1) . '

04/21/2005 06:33:40 AM · #8
Originally posted by 2Shay:

I had a similar photo I was going to enter for the Free Study with a similar look:

' . substr('//images.dpchallenge.com/images_portfolio/34396/thumb/169051.jpg', strrpos('//images.dpchallenge.com/images_portfolio/34396/thumb/169051.jpg', '/') + 1) . '


Nice photo 2shay and thanx for the help lemondster. Now I can prow that my picture are not fake... :)
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