Question

what is the rainbow phenomenon

Answer 1

atmosperic refraction
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Answer 2

hey mate here is your answer. ..

A rainbow is a meteorological phenomenon that is caused by reflection, refraction 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.

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