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Finally, the colours of a circumhorizon arc are pure and spectral (more so than in a rainbow), while the colours in cloud iridescence have a more washed-out, "mother of pearl" appearance. Confusion with other members of the halo family, such as sun dogs or the circumzenithal arc , may also arise, but these are easily dismissed by their entirely ...
Iridescence is therefore mostly seen at cloud edges or in semi-transparent clouds, while newly forming clouds produce the brightest and most colorful iridescence. When the particles in a thin cloud are very similar in size over a large extent, the iridescence takes on the structured form of a corona , a bright circular disk around the Sun or ...
A 'fire rainbow' in the sky enthralled Newburyport, Massachusetts, residents on June 2, 2024. The phenomenon is known technically as a "circumhorizontal arc" and is created by sunlight reflecting ...
An occurrence of altocumulus and cirrocumulus cloud iridescence Sunset reflecting shades of pink onto grey stratocumulus clouds. The color of a cloud, as seen from the Earth, tells much about what is going on inside the cloud. Dense deep tropospheric clouds exhibit a high reflectance (70% to 95%) throughout the visible spectrum.
"Cloud iridescence reminds me of pixie dust or unicorn sprinkles," one meteorologist told CBS News. Here how that colorful weather phenomenon is formed. Rare "rainbow cloud" spotted over Virginia
Iridescence (also known as goniochromism) is the phenomenon of certain surfaces that appear gradually to change colour as the angle of view or the angle of illumination changes. Iridescence is caused by wave interference of light in microstructures or thin films .
Common optical phenomena are often due to the interaction of light from the Sun or Moon with the atmosphere, clouds, water, dust, and other particulates. One common example is the rainbow, when light from the Sun is reflected and refracted by water droplets.
In the Anglo-Cornish dialect of Cornwall, United Kingdom, sun dogs are known as weather dogs (described as "a short segment of a rainbow seen on the horizon, foreshowing foul weather"). It is also known as a lagas in the sky which comes from the Cornish language term for the sun dog lagas awel meaning 'weather's eye' ( lagas , 'eye' and awel ...