How do rainbows form in earths atmosphere?

A rainbow is a semicircular bow, or arc, exhibiting a spectrum of colours; It is a visible sign of Jehovah God's covenant promise that no more would all flesh be cut off by water deluge to bring the earth to ruin. That statement is found in the first Book of The Bible in Genesis 9: 11-16.

Complicated theories and formulas are used to explain the formation of a rainbow. Basically, it seems that a white light enters a raindrop it is refracted and dispersed into different colours, the drop acting like a tiny prism. Each colour strikes the inner surface of the drop and is reflected back at a different and specific angle.

Thus an observer sees a bow with seven colours of the spectrum ( from the inside of the arc outward: violet, indigo, blue, green, yellow, orange, and red),) though these may blend so that only four or five are clear. Sometimes a larger and less distinct "secondy" bow is formed with the colours reversed.

Scientists are still studying the rainbow. The first Biblical reference to a rainbow is in the account of the covenant God made with Noah and his offspring after the Flood survivors came out of the ark. Read Genesis 9: 8-17. This splendid sight of itself would have been reassuring and an indication of peace to Noah and his family.

Whether we do believe or do not believe in God and the Bible a rainbow gives us joy every time it appears after a rainfall.