A fog bow, sometimes called a white rainbow,[1] is a similar phenomenon to a rainbow; however, as its name suggests, it appears as a bow in fog rather than rain.[2] Because of the very small size of water droplets that cause fog—smaller than 0.05 millimeters (0.0020 in)—the fog bow has only very weak colors, with a red outer edge and bluish inner edge.[3] The colors fade due to being smeared out by the diffraction effect of the smaller droplets.[4]
Fogbow over a field360-degree fogbow
In many cases, when the droplets are very small, fog bows appear white, and are therefore sometimes called white rainbows. Along with its larger angular size, this lack of color is a feature of a fog bow that distinguishes it from a glory, which has multiple pale-colored rings caused by diffraction. When droplets forming it are almost all of the same size, the fog bow can have multiple inner rings, or supernumeraries, which are more strongly colored than the main bow.
Fogbow over the ocean
A fog bow seen in clouds, typically from an aircraft looking downwards, is called a cloud bow. Mariners sometimes call fog bows sea-dogs.
A fog bow is seen in the same direction as a rainbow, thus the sun would be behind the head of the observer and the direction of view would be into a bank of fog (which may not be noticeable in directions away from the bow itself). Its outer radius is slightly less than that of a rainbow.
When a fog bow appears at night it is called a lunar fog bow.[5]
Auguste Bravais (1847) "Sur le phénomène de l'arc-en-ciel blanc" (On the phenomenon of the white bow in the sky), Annales de Chimie et de Physique, 3rd series, 21: 348–361.
H. Mohn (February 23, 1888) "Letters to Nature: The fog bow and Ulloa's ring," Nature, 37: 391–392.
James C. McConnel (March 22, 1888) "Letters to Nature: The fog bow," Nature, 37: 486–487.
James C. McConnel (1890) "The theory of fog-bows," Philosophical Magazine, series 5, 29 (181): 453–461.
^APOD: 2006 November 15 - A Fog Bow Over California
Photos and explanation of fogbows at Atmospheric Optics.
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Fogbows at Glows, Bows and Haloes site.
April 11, 2024
sometimes, called, white, rainbow, similar, phenomenon, rainbow, however, name, suggests, appears, rather, than, rain, because, very, small, size, water, droplets, that, cause, smaller, than, millimeters, 0020, only, very, weak, colors, with, outer, edge, blui. A fog bow sometimes called a white rainbow 1 is a similar phenomenon to a rainbow however as its name suggests it appears as a bow in fog rather than rain 2 Because of the very small size of water droplets that cause fog smaller than 0 05 millimeters 0 0020 in the fog bow has only very weak colors with a red outer edge and bluish inner edge 3 The colors fade due to being smeared out by the diffraction effect of the smaller droplets 4 Fogbow over a field360 degree fogbowIn many cases when the droplets are very small fog bows appear white and are therefore sometimes called white rainbows Along with its larger angular size this lack of color is a feature of a fog bow that distinguishes it from a glory which has multiple pale colored rings caused by diffraction When droplets forming it are almost all of the same size the fog bow can have multiple inner rings or supernumeraries which are more strongly colored than the main bow Fogbow over the oceanA fog bow seen in clouds typically from an aircraft looking downwards is called a cloud bow Mariners sometimes call fog bows sea dogs Contents 1 Direction 2 See also 3 References 4 External linksDirection editA fog bow is seen in the same direction as a rainbow thus the sun would be behind the head of the observer and the direction of view would be into a bank of fog which may not be noticeable in directions away from the bow itself Its outer radius is slightly less than that of a rainbow When a fog bow appears at night it is called a lunar fog bow 5 See also editCircumhorizontal arc Circumzenithal arc Cloud iridescence Dewbow Halo Moonbow Sun dogReferences edit Amazing white rainbow snapped over Scottish moor BBC News Online BBC 22 November 2016 Retrieved 22 November 2016 What is a fogbow metoffice gov uk Met Office Retrieved 22 November 2016 See Atmospheric Optics Fogbow Auguste Bravais 1847 Sur le phenomene de l arc en ciel blanc On the phenomenon of the white bow in the sky Annales de Chimie et de Physique 3rd series 21 348 361 H Mohn February 23 1888 Letters to Nature The fog bow and Ulloa s ring Nature 37 391 392 James C McConnel March 22 1888 Letters to Nature The fog bow Nature 37 486 487 James C McConnel 1890 The theory of fog bows Philosophical Magazine series 5 29 181 453 461 APOD 2006 November 15 A Fog Bow Over California Lunar FogbowExternal links edit nbsp Wikimedia Commons has media related to Fogbows Photos and explanation of fogbows at Atmospheric Optics Fogbow image gallery at AKM website Fogbows at Glows Bows and Haloes site Retrieved from https en wikipedia org w index php title Fog bow amp oldid 1104489477, wikipedia, wiki, book, books, library,
