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2014-09-18T20:30:44+05:30
A rainbow is an optical and meteorological phenomenon that is caused by both reflection and refraction of light in water droplets resulting in a spectrum of light appearing in the sky. It takes the form of a multicoloured arc. Rainbows caused by sunlight always appear in the section of sky directly opposite the sun.
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2014-09-18T20:30:58+05:30

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Rainbow is formed when sunlight passes through the water droplets during rain,and these light split up into seven colors forming a band like structure.
In this case water acts as prism and reflects seven colors ( VIBGYOR)
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