The word rainbow comes from the Old English word 'renboga', which is derived from the words 'regn' meaning 'rain' and 'boga' meaning 'anything bent or arched'.
Old English was used 1000 years ago (that's 365,000 days)…
Iris, in Greek mythology was the personification of the rainbow, she was the daughter of Thaumas and the ocean nymph Electra.
Greek mythology dates back to 3122–5020 years ago (that's 1,139,466–1,832,300 days)…
The maths inside: the usual rainbow is the result of one reflection: The total deflection of the ray from its original direction is D = 180 + 2i - 4r where i is the angle of incidence when the ray first hits the drop and r the refraction angle at first contact.
No one sees the same rainbow; each person has a different antisolar point, each person has a different horizon. Despite having different perspectives, we can all enjoy the colours of nature together.
Rainbows are beautiful, symbols of hope, extraordinarily complex and clever.
Chase Rainbows.
