To people, rainbows , as the name implies, are shaped like arcs. Error: they are circular, but we always see them from the ground.
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Rainbows are phenomena that, despite their everyday nature, are always beautiful to see . However, they are not really arcs as we usually represent them, but are completely circular.
What happens is that we usually see it from the ground, in a position that makes it difficult to appreciate it as it is. In order to observe its true shape, we must rely on certain weather circumstances, an exact position of the Sun and see it from above.