Rainbow flag rainbow logo flag on a white field, to clearly promote and strengthen the cooperative image, but still use the rainbow image. Other organizations sometimes use the traditional rainbow flag as a symbol of cooperation. Like the rainbow, this flag is a symbol of hope and peace. The seven colours from flags around the world fly in harmony. Each of the seven colours in the co-operative flag have been assigned the following meaning: The ICA has been flying a flag with its official logo since April 2001, when its Board decided to replace the traditional rainbow flag. Its use by a
Rainbow In Europe, Ibn al-Haytham's "Book of Optics" was translated into Latin and studied by Robert Grosseteste. His work on light was continued by Roger Bacon, who wrote in his "Opus Majus" of 1268 about experiments with light shining through crystals and water droplets showing the colours of the rainbow. In addition, Bacon was the first to calculate the angular size of the rainbow. He stated that the rainbow summit can not appear higher than 42° above the horizon. Theodoric of Freiberg is known to have given an accurate theoretical explanation of both the primary and secondary rainbows in 1307. He