The colors are usually pastel, but can be very vivid. This is the reason why great parts of the cloud have the same colour. The effect is called cloud iridescence or irisation, terms derived from Iris the Greek personification of the rainbow. The cloud must be optically thin, so that most rays encounter only a single droplet. Sorry, your blog cannot share posts by email. The other colours in the iridescent cloud are less due to the changing distance from the sun, but to different sizes of the droplets. Don’t zoom in too close; often the colors stretch out farther than you think.One of the most dramatic cloud shows I have ever witnessed occurred near the end of a month long trek in Nepal from Jiri to Kala Patthar (18,514 ft) and Everest Base Camp by way of two high passes, Renjo La and Cho La. They are caused by ice crystals in cirrus clouds, much as …

Newly-formed and thin clouds have the best chance to create cloud iridescence so that most of the sun's rays only encounter a single crystal. It is a fairly common phenomenon, most often observed in The effect is similar to irisation. Cloud iridescence is the occurrence of colors in a cloud similar to those seen in oil films on puddles, located in the general vicinity of the sun or moon. Diffraction is the bending of light around small objects or sharp edges. Scientifically, rainbow clouds are called iridescent clouds. In most cases this iridescence appears in clouds which form rapidly (e.g. When large ice crystals are present, it produces a rainbow halo effect around the sun or moon… Sometimes you can see that certain parts of clouds show iridescent colours. Here are two of the photos I took of this amazing display of clouds formed by wind over a high mountain.If you are interested in other things you can photograph in the sky, please Iridescent clouds are a diffraction phenomenon caused by small water droplets or small ice crystals individually scattering light. Cloud iridescence is something extremely fascinating which always causes people to grab their phone or camera and either film or photograph.

The water droplets that cause the iridescence are very small. The colors are usually pastel, but can be very vivid. This phenomenon is closely related to the coronae. The colors are usually pastel, but can be … This is the reason why great parts of the cloud have the same colour. According to witnesses, the cloud iridescence … Cloud iridescence or irisation is a colorful optical phenomenon that occurs in a cloud and appears in the general proximity of the Sun or Moon.

In clouds the diffraction produces colors that are usually pastel, but they can be very vivid or mingled together. If the aperture was smaller, the image would quickly get unacceptably fuzzy due to diffraction.Diffraction can be used creatively by adding sunstars to your image.

This is not related to the quality of the lens but merely due to the physics of light.

… Cloud iridescence - Liz Pare via Chime In Newly-formed and thin clouds have the best chance to create cloud iridescence so that most of the sun's … Iridescence is generally produced near the sun, with the sun's glare masking it, so it is more easily seen by hiding the sun behind a tree or building. Other aids are dark glasses, or observing the sky reflected in a convex mirror or in a pool of water. Iridescence is also seen in the much rarer polar stratospheric clouds, also called nac… True iridescent clouds are relatively rare. This fairly common phenomenon is most often observed in altocumulus, cirrocumulus, lenticular, and cirrus clouds. Sunstars are rays of light coming off the sun. If parts of clouds have small droplets or crystals of similar size, their cumulative effect is seen as colors.

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