Question

How rainbows are formed

Answer 1

during early morning or in the evening during rainy or summer season if it rains and during the rain the sun is also shining then the rainbow will form. this happens due to the splitting of white light . in this situation the rain drops acts as prisim and the white sun rays passing through the rain drops forms the rainbow.
hope it helps u.

Answer 2

The properties and behaviour of light, and how it interacts with droplets of water, give rise to one of nature's most colourful meteorological events - the rainbow.

It's all in the geometry...

Rainbows are formed when sunlight is scattered from raindrops into the eyes of an observer.

Most raindrops are spherical rather than the often depicted 'teardrop' shape and it is this spherical shape that provides the conditions for a rainbow to be seen.

The position of the sun and the raindrops in relation to the observer need to be just right for a rainbow to form: