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Why we see a rainbow just after rains? E...

Why we see a rainbow just after rains? Explain the phenomenon as well with a diagram

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Rainbow is caused by dispersion of white sun light by tiny water droplets present in the atmosphere . Wave droplets acts as tiny prism. They refract and disperse the incident sunlight, then reflect in internally and finally refract it again when it comes out of raindrop . Rainbow is always formed in a direction opposite to that of the sun.
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