EPOD - a service of USRA

The Earth Science Picture of the Day (EPOD) highlights the diverse processes and phenomena which shape our planet and our lives. EPOD will collect and archive photos, imagery, graphics, and artwork with short explanatory
captions and links exemplifying features within the Earth system. The
community is invited to contribute digital imagery, short captions and
relevant links.


Lunar Fogbow Observed in Saxony, Germany

January 01, 2021

Nebelbogen-EPOD

Photographer: Heiko Ulbricht
Summary Authors: Heiko Ulbricht; Jim Foster
For the first time in my life I saw a lunar fogbow, as pictured
above arching over an agricultural field in Grumbach, Germany. Because
the Moon was full, this fogbow, also called a cloudbow, was
easily visible.

Droplets that form fogbows are only about 1/10 the diameter of
the raindrops that form rainbows. As a result, there’s greater wave
interference since the wavelengths of visible light tend to
overlap within the tiny droplets. This leads to bows that are not only
wan in appearance but are somewhat wider than rainbows. Photo taken
on October 31, 2020. Note that as this happened to be a Blue Moon,
being able to observe this fogbow was a bit more special.
Photo Details: Canon EOS 6D camera; Sigma ART 24 mm; F2.8; 30-second
exposure; ISO 400
* Grumbach, Germany Coordinates: 51.0313, 13.5460

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More...

Atmospheric Effects Links

* Atmospheric Optics
* Color and Light in Nature
* The Colors of Twillight and Sunset
* Refraction Index
* Image Gallery: Atmospheric Effects
* What is a Rainbow?

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Earth Science Picture of the Day is a service of the Universities
Space Research Association.

https://epod.usra.edu

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