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English: * A vectorized version of Rainbow-diagram-ROYGBIV.PNG. Rainbow diagram showing the conventional arrangement of colours: Red Orange Yellow Green Blue Indigo and Violet. The colours shown do not necessarily correspond to actual wavelengths.
A circumzenithal arc in Salem, Massachusetts, Oct 27, 2012. Also visible are a supralateral arc, Parry arc (upper suncave), and upper tangent arc.. The circumzenithal arc, also called the circumzenith arc (CZA), the upside-down rainbow, and the Bravais arc, [1] is an optical phenomenon similar in appearance to a rainbow, but belonging to the family of halos arising from refraction of sunlight ...
The conventional gradient colors of the rainbow symbol. ROYGBIV is an acronym for the sequence of hues commonly described as making up a rainbow: red, orange, yellow, green, blue, indigo, and violet. When making an artificial rainbow, glass prism is used, but the colors of "ROY-G-BIV" are
Clearly, each strong rainbow coloring is also a rainbow coloring, while the converse is not true in general. It is easy to observe that to rainbow-connect any connected graph G {\displaystyle G} , we need at least diam ( G ) {\displaystyle {\text{diam}}(G)} colors, where diam ( G ) {\displaystyle {\text{diam}}(G)} is the diameter of G ...
Drawing by René Descartes explaining the formation of a rainbow. The antisolar point is the center of the rainbow M. It lies at the end of the straight line running from the sun through the observer's eye E. Centered on the antisolar point, this photo features various antisolar/subhorizon haloes, as viewed from a plane.
The rainbow is curved because the set of all the raindrops that have the right angle between the observer, the drop, and the Sun, lie on a cone pointing at the sun with the observer at the tip. The base of the cone forms a circle at an angle of 40–42° to the line between the observer's head and their shadow but 50% or more of the circle is ...
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The low angle of the sun results in a longer distance for its light to travel through the atmosphere, causing shorter wavelengths of light, such as blue, green and yellow, to be scattered and leaving primarily red. [1] In the lower light environment where the phenomenon most often forms, a monochrome rainbow can leave a highly dramatic effect ...