why rainbow is phenomenon
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Explanation:
rainbow is a natural spectrum.
it is formed after a rainshower in the direction opposite to that of the sun.
tiny water droplets act like small prism and disperse white light into its component colours.
taking the case of a water droplet, first a ray of light enters the water drolet and refracts.
then disperse into the 7 colours
then, it undergoes internal reflection and again refraction. thus, a rainbow is formed.
sequence of events --
1. refraction
2. dispersion
3. internal reflection
4.refraction
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Answer:
Dark black and atmosphere
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