File:Brilliant double rainbow after a sudden rainstorm (explore) - Flickr - Peggy2012CREATIVELENZ.jpg
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[edit]DescriptionBrilliant double rainbow after a sudden rainstorm (explore) - Flickr - Peggy2012CREATIVELENZ.jpg |
Click to view in Lightbox. . Explore #158 on Mar 7, 2012. . A rainbow is an optical and meteorological phenomenon that causes a spectrum of light to appear in the sky when the Sun shines on to droplets of moisture in the Earth's atmosphere. It takes the form of a multicoloured arc. Rainbows caused by sunlight always appear in the section of sky directly opposite the sun. In a "primary rainbow", the arc shows red on the outer part, and violet on the inner side. This rainbow is caused by light being refracted while entering a droplet of water, then reflected inside on the back of the droplet and refracted again when leaving it. In a double rainbow, a second arc is seen outside the primary arc, and has the order of its colours reversed, red facing toward the other one, in both rainbows. This second rainbow is caused by light reflecting twice inside water droplets. The region between a double rainbow is dark, and is known as "Alexander's band" or "Alexander's dark band". The rainbow is not located at a specific distance, but comes from any water droplets viewed from a certain angle relative to the Sun's rays. Thus, a rainbow is not a physical object, and cannot be physically approached. Indeed, it is impossible for an observer to manoeuvre to see any rainbow from water droplets at any angle other than the customary one of 42 degrees from the direction opposite the Sun. Even if an observer sees another observer who seems "under" or "at the end" of a rainbow, the second observer will see a different rainbow further off-yet, at the same angle as seen by the first observer. A rainbow spans a continuous spectrum of colours. Any distinct bands perceived are an artefact of human colour vision, and no banding of any type is seen in a black-and-white photo of a rainbow, only a smooth gradation of intensity to a maximum, then fading towards the other side. For colours seen by a normal human eye, the most commonly cited and remembered sequence, in English, is Newton's sevenfold red, orange, yellow, green, blue, indigo and violet. Rainbows can be caused by many forms of airborne water. These include not only rain, but also mist, spray, and airborne dew.
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Date | Taken on 22 February 2012, 02:03 |
Source | Brilliant double rainbow after a sudden rainstorm (explore) |
Author | Peggy2012CREATIVELENZ |
Flickr tags InfoField | peggy2012creativelenz , rainbow , city , sky , img_3254ap , n van , bc , canada , alexander's band , red , orange yellow green blue indigo violet. , sunshine , blink again , explore |
Licensing
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- to share – to copy, distribute and transmit the work
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- Under the following conditions:
- attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
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This image was originally posted to Flickr by Peggy2012CREATIVELENZ at https://flickr.com/photos/73230975@N03/6958309397. It was reviewed on 20 July 2020 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
20 July 2020
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 07:41, 20 July 2020 | ![]() | 2,640 × 1,980 (1,020 KB) | Red panda bot (talk | contribs) | In Flickr Explore: 2012-03-07 |
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Metadata
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Camera manufacturer | Canon |
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Camera model | Canon PowerShot ELPH 100 HS |
Exposure time | 1/800 sec (0.00125) |
F-number | f/2.8 |
ISO speed rating | 100 |
Date and time of data generation | 02:03, 22 February 2012 |
Lens focal length | 5 mm |
Horizontal resolution | 180 dpi |
Vertical resolution | 180 dpi |
Software used | picnik.com |
File change date and time | 22:45, 28 February 2012 |
Y and C positioning | Centered |
Exif version | 2.3 |
Date and time of digitizing | 02:03, 22 February 2012 |
Meaning of each component |
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APEX shutter speed | 9.6564248651948 |
APEX aperture | 2.9708536585366 |
APEX exposure bias | 0 |
Maximum land aperture | 2.9708536585366 APEX (f/2.8) |
Metering mode | Pattern |
Flash | Flash did not fire, compulsory flash suppression |
DateTime subseconds | 65 |
Supported Flashpix version | 1 |
Color space | sRGB |
Focal plane X resolution | 16,393.442622951 |
Focal plane Y resolution | 16,393.442622951 |
Focal plane resolution unit | inches |
Sensing method | One-chip color area sensor |
File source | Digital still camera |
Custom image processing | Normal process |
Exposure mode | Auto exposure |
White balance | Auto white balance |
Digital zoom ratio | 1 |
Scene capture type | Standard |
Image compression mode | 3 |
Image width | 4,000 px |
Image height | 3,000 px |
Rating (out of 5) | 0 |
IIM version | 4 |