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In Las Fotos de los Lectores de La Vanguardia we can see the rainbow in the area of ​​L’Atlà ntida de Vic (Osona), a very important meteorological phenomenon in times of drought, since it is usually associated with rain.
The rainbow is a harbinger of rain or calm weather, depending on the direction it appears. According to popular culture, the rainbow, in the Levant direction, only appears in the afternoon and, in the West, in the morning, that is, facing the sun.
Although the rainbow is a continuous gradient of spectral colors, it is considered that these can be defined in seven fundamental colors: red, orange, yellow, green, cyan, blue and violet, which are equivalent to those mentioned by the scientist Isaac Newton in 1704. .
A rainbow or rainbow is an optical and meteorological phenomenon that consists of the appearance in the sky of an arc (sometimes two or more) of multicolored light.
It is caused by the decomposition of sunlight in the visible spectrum, which is produced by refraction, when the sun’s rays pass through small drops of water contained in the earth’s atmosphere.
It is an arc made up of concentric colored arcs, without a solution of continuity between them, with red towards the outside and violet towards the interior.
The Spanish agricultural proverb has left us abundant samples of popular sayings related to the rainbow. Some examples:
