How are rainbows made please?

Question

something to do with light prisims? and how come some are brighter and some stay longer than others?

Answer 1

Rainbows are created by sunlight passing through water droplets or mist still falling after a thunder shower or passing rain. It only happens when the sun shines right after a rain shower. It also means if you're a believer, Gods promise, that the earth would never end again by a flood, as in Noah's day.

Answer 2

Water is dispersive: the speed of light in water depends on its wavelength.  So, a water droplet works like a prism.  Rainbows often appear double; in one of them, there is one internal reflection in each water drop, and in the other, there are two.

Answer 3

dispersion of white light into the 7 colours...due to refraction...with the little numerous tiny droplets of water as prisms....