A rainbow comes in the sky at the end of rain.Rainbow is so long and it has seven colours.Scientists say that when sun light passes through a narrow medium to a thick medium,the seven colours which are present in white light form a semicircular rainbow.The seven colours are indigo,violet,blue,yellow,green,orange and red.Many people believe that if a rainbow comes after the rain,it is a hint that there will be no more rains.The rainbow looks very beautiful.The small children have very excited when they see a beautiful rainbow.
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(https://www.pexels.com/photo/rainbow-830829/)
