Question

How are rainbows formed?out the answer in three or less lines

Answer 1

Rainbow are formed due to scattering of light.....Due to this phenomenon,A white light gets scattered into seven colors......same thing happen in sky.... Atmosphere acts as a scattering medium(for ex like prism) and it scatters the light into 7 colors..
Hope my answer will help u
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Answer 2

A rainbow is metrological phenomenon that is caused by reflection, reflection and dispersion of light in water droplets resulting in a spectrum of light appearing in the sky.
it takes the form of a multicoloured circular arc. rainbows caused by sunlight always appear in the section of sky directly opposite the sun.

I hope it's helpful for you dear friend.